HELP PLEASE! I am taking my college placement test tomorrow and am working on the sample test now. I need help with this question about Rational Expressions... For all r (is not equal to sign)+ or - 2 r(squared) -

29,886 questions
1. MATH - Rational Expressions

HELP PLEASE! I am taking my college placement test tomorrow and am working on the sample test now. I need help with this question about Rational Expressions... For all r (is not equal to sign)+ or - 2 r(squared) - 5r+6 (All Over) r(squared)- 4 I know the

asked by J on August 16, 2005
2. Algebra

I am going to take an Accuplacer math placement test later this week. It is to determine what math course I need to take in college. The school would like me to place in statistics.This will be my second time taking the test. The first time I placed in

asked by Christian on April 1, 2008
3. English

There is a placement test for Writing 121 and I need to earn a certain score as a prerequisite. What is the placement test like? Is it time?Can you give me a sample and grade it? We may have to keep track of each other posts.

asked by Anonymous on November 17, 2013
4. statistics

Reading placement scores for a particular college are normally distributed with a mean of 72 and a standard deviation of 7. a) draw a sketch of the reading placement scores for students at this college. be sure to mark the mean and also to mark one and two

asked by whitney on June 3, 2012
5. Stats

the average placement test score of a sample of 64 students out of 1000 registered at a community college is 70 with a standard deviation of 15. Construct a confidence interval with a 5% chance of error.

asked by D on April 6, 2014
6. trig

hi, I have a placement test coming up tomorrow, and I'm pretty confident about all the stuff that's going to be there except trigonometry. I took trig two years back and I understood it very well. But now it's been so long and I can't even remember the

asked by y912f on June 1, 2010
7. College testing

Im gettin ready to take a placement test for Devry Unviersity. it says Reading , Writing, Arithmetic and Algebra makes up the test. is there any way i can pepare for this test? how long does placement test usually take to complete?

asked by Bryan on May 20, 2008
8. statisitcs

The combined math and verbal scores for students taking a national standardized examination for college admission is normally distributed with a mean of 560 and a standard deviation of 180. If a college requires a student to be in the top 40 % of students

asked by veronica on October 23, 2014
9. Math

The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 620 and a standard deviation of 220. If a college requires a student to be in the top 10 % of students

asked by Ashley on February 9, 2014
10. Chemistry

Hi, I have to take chemistry placement test for college this week. Does anyone here have advice for studying to prepare for the test? I took chemistry in high school 2 years ago so I don't remember anything.

11. statistics

The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is the probability a sample

asked by Vanessa on April 15, 2014
12. Math

The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is the probability a sample

asked by Vanessa on April 16, 2014
13. Statistics

The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is the probability a sample

asked by Vanessa on April 16, 2014
14. statistics

The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is the probability a sample

asked by Vanessa on April 14, 2014
15. statistics

You are conducting an experiment to see if a given therapy works to reduce test anxiety in a sample of college students. A standard measure of test anxiety is known to produce a  = 19. In the sample you draw of 86 the mean is equal 17.5 with standard

asked by sai on January 6, 2012
16. Statistics

A group of 56 randomly selected students have a mean score of 30.8 and a standard deviation of ó = 4.5 on a placement test. Find a 95% confidence interval for the mean score, ì, of all students taking the test.

asked by Erica on November 1, 2010
17. Stats

A group of 56 randomly selected students have a mean score of 30.8 and a standard deviation of 4.5 on a placement test. Find a 95% confidence interval for the mean score, ì, of all students taking the test. (Note: ó is unknown.)

asked by Erica on November 1, 2010
18. Help with Psychology Homework

Your professor asks you to take a personality test. After taking the test, you read your description of your personality type, and are disappointed that the results do not seem to capture your personality at all. In fact, you think the test probably

asked by Chris on March 24, 2015
19. Statistics

Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or

asked by Ira on July 16, 2013
20. Statistics Help !!!!

Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or

asked by Tise on July 19, 2013
21. Statistics Help !!

Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or

asked by Rey on July 14, 2013
22. statistics

A marketing research ﬁrm suspects that a particular product has higher name recognition among college graduates than among high school graduates. A sample from each population is selected, and each asked if they have heard of the product in question. A

asked by Joshua on November 17, 2010
23. chemistry

I am a freshman in college, and am taking a placement test soon, but haven't seen chemistry since 10th grade. I'd appreciate any help I can get from anyone here to help me solve this problem: Hydrogen and sulfur chemically combine to form the gas hydrogen

asked by John on January 5, 2012
24. math

A magazine claims that 25% of its readers are college students. Of a random sample of 200 readers, 42 are college students. Use a .10 level of significance to test Ho: p =.25 and H1: p ≠ .25 Show the hypothesis test procedure.

asked by cristi on September 14, 2010
25. Statistics

You want to know if there's a difference between the proportions of high school students and college students who read newspapers regularly. out of a random sample of 500 high-school students, 287 say they read newspapers regularly, and out of a random

asked by debbie on May 1, 2014
26. essay

During my four years in high school, I have taken a lots of classes to prepare for college. As I took ELD classes ( English Language Development ) during my freshman and sophomore year, I realized that I could not meet the college's requirement. So in my

asked by JJ on November 30, 2006
27. Linear Equation in Two Variables

I have to take a college placement test and am studying the practive test. He is the question . . . What is the equation of the line that contains the points with (x,y) coordinates (-3,7) and (5,-1)? I know that the answer is y=-x+4, but I cannot remember

asked by J on August 2, 2005
28. statistics

10th grade New York public school students taking a standardized English test produced test scores that were normally distributed with a mean of 85 and a standard deviation of 4. Let x be a random variable that represents the test score of a student.

asked by jill on December 4, 2016
29. statistics

A researcher believe that college students spend a different amount of time talking on the phone than they do instant messaging. She takes a random sample of 12 college students and records the number of hours per week each student spends on each activity

asked by anon on April 26, 2014
30. Statistics

You want to know if there's a difference between the proportions of high school students and college students who read newspapers regularly. out of a random sample of 500 high-school students, 287 say they read newspapers regularly, and out of a random

asked by debbie on May 1, 2014
31. statistics

Given the oft-cited statistic that 66.7% of the American public is overweight or obese, you are interested in comparing college students BMI level to the general population. Assuming that the general population has a BMI of (μ) = 27.5 using α level of

asked by HLR on April 23, 2009
32. probability

The National Center for Educational Statistics reported that in 2009 the ACT college placement and admission examination were normally distributed and had a mean of 21.1 and standard deviation of 5.1. A college requires applicants to have an ACT score in

asked by matt on September 21, 2015
33. School

What is the best description of an advanced placement course? A. a rigorous version of a regular subject B. a course that is consistent with college/university courses and prepares a student to take AP exams in a particular subject area and opt out of

asked by Laura on September 19, 2017
34. Math - Functions

Please help! I have a test tomorrow. I've been working on this forever and just can't figure out the equation. Inputs X - 0, 3, 6, 9 Outputs Y - 1, 2, 3, 4

asked by Shannon on May 30, 2012

Today is my NYS ELA Exam Book 1: Multiple Choice Questions. I know I'm supposed to be at school but the 7th graders take the exam around 12:30 or 12:40. Right now the 8th graders are (still) taking the exam so I'm still at home. Tomorrow is Book 2:

asked by Laruen on April 17, 2012
36. chemistry placement exam

has anyone taken a chemistry placement exam prior to their 1st year of college? what's it like? look up chemistry placement exam on yaahoo and there are a whole lot of websites that talk about what you are asking! hope this helps! You might browse these

asked by Hawk on June 21, 2006
37. Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

asked by Katy on November 27, 2013
38. statistics

a random sample of 80 college students was selected to participate in a experiment. the mean of the sample is 317 points, the standard deviation of 37 there are 310 students that didn't complete the experiment 1. compute the appropriate test statistic? 2.

asked by Anonymous on July 11, 2012
39. math

need to make a venn diagram using 3 circles. A survey on subject being taken by 250 students at a certain college revealed the following info: 1. 90 were taking math 2. 145 were taking history 3. 88 were taking english 4. 25 were taking math and history 5.

asked by kyle on August 6, 2012
40. chemistry

what is the density of an 84.7g sample of an unknown substance if the sample occupies 49.6cm3? what volume would be occupied by 7.75g of this same substance? PLEASE help need the answer tonight i have a test tomorrow i kind of not understand the second

asked by heather on September 22, 2010
41. statistics

Question: A standard placement test has a mean of 105 and a standard deviation of ó = 13. Determine the minimum sample size if we want to be 99% certain that we are within 3 points of the true mean. Answer: N = ( zc ó/E)^2 = (2.575 x 13/3)^2 = 121

asked by looking for someone to varify my work please on April 6, 2010
42. statistics

Pleas HeLp!!!!!!!!!! A random sample of the test scores of 100 applicants for college entry at a large junior college showed a mean score of 72.6. Determine a 99%, 95%, and 90% confidence interval for the m mean score of all applicants at the junior

asked by courntey on September 17, 2011
43. Statistics

A study in Orlando, Florida claimed that the mean commute time for all employees working at Disney exceeds 40 minutes. This figure is higher than what was assumed in the past. The plan is to test this claim at a level of significance = 0.05 and a sample

asked by Amy on April 4, 2012
44. Statistics

The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. Identify the design of the study. A) Paired t-test

asked by Samantha on November 21, 2013
45. Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

asked by Katy on November 28, 2013
46. Maths probability

Records show that 8% of blood samples tested for a certain condition test positive. Assuming that whether or not a blood sample tests positive is independent of whether or not any other blood sample tests positive, calculate by hand the following

asked by Tanisha on January 16, 2017
47. North Central

Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a

asked by Mashel on November 2, 2014
48. math

Reading readiness of preschoolers from an impoverished neighborhood (n = 20) was measured using a standardized test. Nationally, the mean on this test for preschoolers is 30.9, with s = 2.08. a.Children below the 30th percentile are in need of special

asked by Elizabeth on September 3, 2010
49. Statistics

Which test determines if there is a difference between the mean of a group and proposed standard value? Paired t-test F-test One Sample t-test One way ANOVA Two sample t-test

asked by Beata Chmielewska on September 15, 2010

Experience in investigating insurance claims shows that the average cost to process a claim is approximately normally distributed with a mean of \$80. New cost-cutting measures were started and a sample of 25 claims was tested. The sample mean of the costs

asked by gina on December 12, 2012
51. statistics

Experience in investigating insurance claims shows that the average cost to process a claim is approximately normally distributed with a mean of \$80. New cost-cutting measures were started and a sample of 25 claims was tested. The sample mean of the costs

asked by Aurora G on December 6, 2012
52. stats

A researcher hypothesizes that a new herbal supplement improves memory. A sample of n = 25 college students is obtained and each student takes the supplement daily for six weeks. At the end of the 6-week period, each student is given a standardized memory

asked by Komal on October 23, 2012
53. Probabilty & Statistic

A random sample is selected from a normal population with a mean of __40 and a standard deviation of __10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M _ 42. a. How large a sample is necessary for

asked by Sharon on January 23, 2012
54. Statistics

. A random sample is selected from a normal population with a mean of __40 and a standard deviation of __10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M _ 42. a. How large a sample is necessary for

asked by Sharon on January 26, 2012
55. statistics

Select the TWO options that are TRUE statements about two-sample t-tests. Select one or more: The same formula is used for the ESE (estimated standard error) in the two-sample t-test with a common variance and the two-sample t-test with unequal variances.

asked by mina on August 23, 2016
56. statistics

Select the TWO options that are TRUE statements about two-sample t-tests. Select one or more: The same formula is used for the ESE (estimated standard error) in the two-sample t-test with a common variance and the two-sample t-test with unequal variances.

asked by mina on August 21, 2016
57. Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

asked by Katy on November 30, 2013
58. Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

asked by Katy on November 30, 2013
59. Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

asked by Katy on November 29, 2013
60. statistics

Suppose it is known that the average score of all high school seniors taking a national test of basic skills is 420. These scores are normally distributed with a standard deviation of 80. A school gives the test to a sample of 144 seniors. Identify the

asked by nana on October 2, 2012
61. Statistics

A study in Orlando, Florida claimed that the mean commute time for all employees working at Disney exceeds 40 minutes. This figure is higher than what was assumed in the past. The plan is to test this claim at a level of significance = 0.05 and a sample

asked by Latoya on April 27, 2012
62. statistics

A study in Orlando, Florida claimed that the mean commute time for all employees working at Disney exceeds 40 minutes. This figure is higher than what was assumed in the past. The plan is to test this claim at a level of significance = 0.05 and a sample

asked by Amy on April 18, 2012
63. English

Which of the following sentence orders best forms an organized, logical paragraph? 1. Planning for a test involves determining the time needed for studying, reviewing notes and previous assignments, and prioritizing the content matter to be studied. 2.

asked by John on May 26, 2015
64. statistics

A credit card company estimates that the average credit card balance of Americans is \$3,210. A statistics student wants to know whether this is true for citizens of her home town. Which hypothesis test would be most appropriate for addressing this

65. Statistics

How do you find the p-value??? Thanks! In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the

asked by Becca on June 19, 2015
66. Algebra 2

1.) According to the American College Test (ACT), results from the 2004 ACT testing found that students had a mean reading score of 21.3 and a standard deviation of 6.0. The scores are normally distributed. A student scores a 35. What percent of the data

asked by Lanie on April 4, 2014
67. english

Which of the following sentence orders best forms an organized, logical paragraph? 1. Planning for a test involves determining the time needed for studying, reviewing notes and previous assignments, and prioritizing the content matter to be studied. 2.

asked by mandi on May 24, 2015
68. Science 7R

Tomorrow I have a science test on circulatory system and is there a practice test THAT IS ON 7TH GRADE SCIENCE REGENTS LEVEL!?!? please i really want to do well on the test if take a pre-test thanks ;) btw --- i'm going over my notes for the test just that

asked by Laruen on May 15, 2012

Excelling at taking tests depends on; a)knowing the 'what and how " of test taking b)the amount of hours of spending studying c)reviewing all the materials covered in the course d)how well rested you are before the test My answer is a :)))

asked by Vedrana on December 16, 2015
70. Test Prep for College Final

I have been taking a distance learning course the past year. It is a correspondence course through a regionally accredited college. I need this course for my degree. I am going to take my final in two days at the college that is acting as my proctor. I

asked by G on November 23, 2008
71. AP BIO

a student wished to test a sample of organic material to determine whether it was sugar, a dat, or starch. If she could perform only one of the following, which would be the most revealing? 1- test for the presence of carbon and hydrogen in the sample 2-

asked by bubba on October 7, 2009
72. maths

Experience in investigating insurance claims shows that the average cost to process a claim is approximately normally distributed with a mean of 80 dollars. New cost-cutting measures were started and a sample of 25 claims was tested. The sample mean of the

asked by Hani on April 23, 2014
73. statistics

Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose a researcher selects a random sample of n=36 male

asked by Janice on July 10, 2013
74. statistics

Each person in random sample of 247 male and 253 female working adults living in Calgary, Canada was asked how long, in minutes, his or her typical daily commute was. use the accompanying summary statistics and an appropriate hypothesis test to determine

asked by BOB on April 20, 2011
75. math

Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a

asked by lewis on September 14, 2012
76. statistics

7. A sample of 40 observations is selected from one population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second population. The sample mean is 99 and the sample standard deviation is 6.

asked by Barbara on February 28, 2010
77. Statistics

Help me understand this problem, I have several more like this & want to get an understanding on to solve it: The mean score,x, on an aptitude test for a random sample of 9 students was 64. Assuming that standard deviation=16, construct a 95.44% confidence

asked by Lexie on September 13, 2008
78. Statistics

8. A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is .75. A sample of 50 observations is selected from a second population. The sample mean is 2.59 and the sample standard deviation is

asked by Barbara on February 28, 2010
79. MATH STATS

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

asked by Vanessa on July 4, 2011
80. U.S. Government

How is the American Government Organized and their functions? - I have to write a 5 paragraph essay and I need help researching. - Do you know a website I can get information? P.S ; I do not have a book. I'm taking an online class and I have to

asked by Allison on July 23, 2013
81. Stats

Consider the following Hypotheses test: Ho:m>=80 Ha:m

asked by bobbie on April 29, 2012
82. Math (Calculus AB)

For x≠0, the slope of the tangent to y=xcosx equals zero whenever: (a) tanx=-x (b) tanx=1/x (c) sinx=x (d) cosx=x Please help. I have a final tomorrow and I am working diligently to understand every type of problem that may show up on my test. Thank you

asked by Jake on January 24, 2011
83. Math (Calculus AB)

For x≠0, the slope of the tangent to y=xcosx equals zero whenever: (a) tanx=-x (b) tanx=1/x (c) sinx=x (d) cosx=x Please help. I have a final tomorrow and I am working diligently to understand every type of problem that may show up on my test. Thank you

asked by Jake on January 24, 2011
84. statistics

It is known that the population mean for the Quantitative section of the GRE is 500, with a standard deviation of 100. In 2006, a sample of 400 students taking the GRE, whose family income was between \$70,000 and \$80,000, had a quantitative GRE score of

asked by Lee on April 29, 2014
85. statistics

Can someone please explain to me the procedures for getting an answer to the questions. Step by step would be great since I'm very confused. I know it's probably simple. * Numerous studies have demonstrated that listening to music while studying can

asked by Lily on February 28, 2008
86. Math

A national study reports that 20% of college freshman have GPA above 3.5. We wish to determine if the corresponding proportion is higher at a local university. To conduct the test we select a random sample of 100 freshmen and determine that 26 of them have

asked by Kathy on April 30, 2013
87. probability

out of 250 students interviewed at a community college, 90 were taking mathematics but not computer science, 160 were taking mathematics, and 50 were taking neither mathematics nor computer science. Find the probability that a student chosen at random was

asked by Emma on October 27, 2011
88. Sampling Distributions

A firm produces batteries that have a lifetime which is normally distributed with a mean of 360 minutes and a standard deviation of 30 minutes. The firm needs to keep an eye on the production process to ensure that everything is working properly and that

asked by Lau on April 21, 2016
89. algebra

I really need that to my examples in my report tomorrow those i posted question, its a kind of test tomorrow please help me now please... even if now only...

asked by jhia on September 23, 2014
90. statistics

A college professor believes that students take an average of 15 credit hours per semester. A random sample of 24 students in his class of 250 reported the following number of credit hours that they were taking:

asked by Dorothy on December 30, 2011
91. Statistic

A restaurant that bills its house account monthly is concerned that the average monthly bill exceeds \$200 per account. A random sample of twelve accounts is selected, resulting in the sample mean of \$220 and a sample standard deviation of \$12. The

asked by Marilyn on October 20, 2008
92. to ms.sue

is there a website where i can take a review test of the test i have heard of a land because i forgot to take my practice book home and tomorrow is the test.

asked by Celest on May 3, 2012
93. statistics

experience in investigating insurance claims show that the averagecost to process a claim is approximately normally distributed witha mean of \$80.new cost-cutting measures were started and a sampleof 25 claims was tested .the sample mean of the costs to

asked by gina on December 15, 2012
94. statistics

1.test wheter these samples represent populations that are different from the general population- sample of 10 with a mean of 44 and sample of 1 with a mean of 48. 2. The general population of individuals has a mean of 40 , a deviation of 6, and follows a

asked by Stephanie on October 22, 2010
95. Resume

Is the commment placement correct in the first part of my resume? OBJECTIVE To attend an excellent college or university that will provide a challenging course of study in world cultures and languages, with a study abroad program to enrich my knowledge of

asked by Corin on June 9, 2007
96. Writing Skills Test

I just want to know what this test consist of. I'm taking Comp/220 and in the 8th week. I don't want any answers just want to know what the test consist of so I can prepare before taking.

asked by Dana on January 25, 2011
97. psy/315

Two boats, the Prada (Italy) and the Oracle (USA), are competing for a spot in the upcoming America’s Cup race. They race over a part of the course several times. The sample times in minutes for the Prada were as follows: 12.9, 12.5, 11.0, 13.3, 11.2,

asked by trudyann Blackmon on October 23, 2016
98. Data Analysis

A firm produces batteries that have a lifetime which is normally distributed with a mean of 360 minutes and a standard deviation of 30 minutes. The firm needs to keep an eye on the production process to ensure that everything is working properly and that

asked by Sam on April 23, 2016
99. stats

8-A bakery stated that the average number of breads sold daily is 3000. An employee thinks that the actual value might differ from this and wants to test this statement. The correct hypotheses are: (1) H0 : ¦Ì = 3000 H1 : ¦Ì not= 3000 (2) H0 : ¦Ì >

asked by Judy and group on April 1, 2010
100. Statistics Math

1. What type of car is more popular among college students, American or foreign? One hundred fifty-nine college students were randomly sampled and each was asked which type of car he or she prefers. A computer package was used to generate the printout

asked by Michael on October 27, 2013