Friday

June 24, 2016
**Statistics**

Imagine you're a researcher and you need to perform a one-sided test of an alternative hypothesis. You decide to conduct a significance test at the .05 level. Which of the following ranges of z-scores would make the test statistic significant at .05 (one-tail) but not at ....
*Friday, March 4, 2016 by Jim*

**statistics**

Find the number of different selections of 4 letters from the 9 letters of the word HAPPINESS which contain no P's and either one or two S's.
*Friday, March 4, 2016 by Zeest*

**statistics**

if 3 couples sit in a row of chairs what is the probability that each couple sits together? what is the probability all the women sit together and the men may or may not be in the group? what is the probability that the women sit together and the men sit together?
*Thursday, March 3, 2016 by brittaney*

**statistics**

after rolling 5 dice , what is the probability that all 5 of the values are different? 720/7776
*Thursday, March 3, 2016 by brittaney*

**statistics**

a math class has 50 students , of these 22 students are math majors and 18 students are male. Of the math majors 16 are female. Find the probability that a randomly selected student is male or a math major . my answer 22/50 and 18/50 = 396/50= 7.29
*Thursday, March 3, 2016 by brittaney*

**statistics**

If a random password is 3 letters(a-z) and 1 number (0-9) what is the possibility that the password will have 2 of the same letters? 26x26x26=17576
*Thursday, March 3, 2016 by brittaney*

**Statistics**

If four coins are flipped at once, find the probability that there will be at least 2 heads. Round your answer to 3 decimal places.
*Wednesday, March 2, 2016 by Hunter*

**Statistics**

Two high school students took equivalent language tests, one in German and one in French. The student taking the German test, for which the mean was 66 and the standard deviation was 8, scored an 82, while the student taking the French test, for which the mean was 27 and the ...
*Wednesday, March 2, 2016 by Anonymous*

**Statistics **

A particular fruit's weights are normally distributed, with a mean of 764 grams and a standard deviation of 33 grams. The heaviest 15% of fruits weigh more than how many grams? Give your answer to the nearest gram.
*Monday, February 29, 2016 by Bailey*

**Statistics**

A random variable x has the following probability distribution: x f(x) 0 0.08 1 0.17 2 0.45 3 0.25 4 0.05
*Sunday, February 28, 2016 by Donzella*

**research statistics**

Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9. Develop a 99% confidence interval for the population mean. (Round your answers to 3 decimal places.)
*Saturday, February 27, 2016 by myke*

**Statistics**

In a shipment of 21 parts, four of the parts are defective. If three parts are selected at random without replacement, find the probability that : a.) All three parts selected are defective. 4/21*3/20*2/19=.003 b.) None of the tree parts selected are defective. 3/17*2/16*1/15...
*Friday, February 26, 2016 by Grace*

**statistics please help!**

Assume an office has two telephones (A and B) with separate lines and different telephone numbers. The probability that telephone A rings when the office is closed is .30. The probability that telephone B rings when the office is closed is .20 What is the probability that A ...
*Thursday, February 25, 2016 by Alondra*

**statistics please help!**

Assume an office has two telephones (A and B) with separate lines and different telephone numbers. The probability that telephone A rings when the office is closed is .30. The probability that telephone B rings when the office is closed is .20. What is the probability that ...
*Thursday, February 25, 2016 by Alondra*

**statistics please help!**

Assume an office has two telephones (A and B) with separate lines and different telephone numbers. The probability that telephone A rings when the office is closed is .30. The probability that telephone B rings when the office is closed is .20 What is the probability that ...
*Thursday, February 25, 2016 by Alondra*

**statistics please help!**

Assume an office has two telephones (A and B) with separate lines and different telephone numbers. The probability that telephone A rings when the office is closed is .30. The probability that telephone B rings when the office is closed is .20. What is the probability that ...
*Thursday, February 25, 2016 by Alondra*

**Statistics for the Behavioral Sciences**

Complete an independent project, collect data from your observation experiment and perform a one-way, between-subjects ANOVA on the data using the definitional formula.Include the following: 1. description of research project that includes the operational definition for the ...
*Thursday, February 25, 2016 by Pamela*

**statistics please help!**

If 3 cards are drawn with replacement from a shuffled deck, what is the probability that at least one of them will be a heart
*Thursday, February 25, 2016 by Denise*

**statistics please help!**

If 3 cards are drawn with replacement from a shuffled deck, what is the probability that none of the 3 will be hearts?
*Thursday, February 25, 2016 by Denise*

**statistics please help!**

If 3 cards are drawn with replacement from a shuffled deck, what is the probability that all 3 will be hearts?
*Thursday, February 25, 2016 by Denise*

**statistics**

Identify the level of measurement of the data and explain what is wrong with the given calculation. In a set of data, movie ratings are represented as 100 for 1 star, 200 for 2 stars, and 300 stars for 3 stars. The average (mean) of the 527 movie ratings is 231.2. I got ...
*Thursday, February 25, 2016 by Anonymous*

**Statistics**

The mean grade in this class last semester was 78.3, and the variance was 49 . The distribution of grades was unimodal and symmetrical. Using this information determine the probability that “Joe”, a random student you know nothing about, other than the fact that they...
*Thursday, February 25, 2016 by Francisco*

**statistics**

If p(A)=.50, p(B)=.60, and p(A and B)=.30, Are A and B mutually exclusive events? and independent events?
*Thursday, February 25, 2016 by Nelly*

**statistics**

if a die is tossed four times what is the probability of getting at least one six
*Thursday, February 25, 2016 by Nelly*

**statistics**

if a die is tossed four times what is the probability of getting anything but a five on every toss
*Thursday, February 25, 2016 by Nelly*

**statistics**

if a die is tossed four times what is the probability of getting three odd numbers
*Thursday, February 25, 2016 by Nelly*

**statistics**

if a die is tossed four times what is the probability of getting one six
*Thursday, February 25, 2016 by Nelly*

**statistics**

5 students go to school one of which is known to be late; in fact he is late 22% of the time. What is the probability that he will not be late for school.
*Wednesday, February 24, 2016 by Sam*

**statistics**

5 cards are drawn out of a regular deck without replacement; you win if you get at least one red card. What is the probability of getting at least one red card?
*Wednesday, February 24, 2016 by Shawn*

**Statistics**

To win one version of the New York State lottery, one must correctly select 5 numbers from 49 numbers. How many different selections are possible if: ~ The order in which the selection is made does not matter? ~ The order of selection does matter?
*Wednesday, February 24, 2016 by Ana*

**statistics**

The second moment about mean oftwo distributions are 13.76 and 63.0 while the fourth moment about the men are 528.06 and 9500 respectively which of distribution is 1 leptokuric [2] mesokuric [3] platykurtic
*Monday, February 22, 2016 by shumaila*

**statistics**

Minutes 126.53 127.27 130 130.35 130.4 130.58 130.87 131.18 131.98 132.55 133.28 133.42 133.43 133.55 133.65 134 134.37 134.62 134.73 135 135.95 136.12 136.17 136.23 136.28 137.7 137.83 137.93 138.18 138.25 138.43 138.67 139.13 139.72 140.25 140.38 140.4 140.42 140.5 141.27 ...
*Sunday, February 21, 2016 by hana*

**statistics**

state whether the quantity described is a parameter or a statistic and give the correct notation. Correlation between height and weight for players on the 2010 Brazil World Cup team, using data from all 23 players on the roster. thanks
*Sunday, February 21, 2016 by hana*

**statistics**

Minutes 126.53 127.27 130 130.35 130.4 130.58 130.87 131.18 131.98 132.55 133.28 133.42 133.43 133.55 133.65 134 134.37 134.62 134.73 135 135.95 136.12 136.17 136.23 136.28 137.7 137.83 137.93 138.18 138.25 138.43 138.67 139.13 139.72 140.25 140.38 140.4 140.42 140.5 141.27 ...
*Sunday, February 21, 2016 by vicke*

**statistics**

Minutes 126.53 127.27 130 130.35 130.4 130.58 130.87 131.18 131.98 132.55 133.28 133.42 133.43 133.55 133.65 134 134.37 134.62 134.73 135 135.95 136.12 136.17 136.23 136.28 137.7 137.83 137.93 138.18 138.25 138.43 138.67 139.13 139.72 140.25 140.38 140.4 140.42 140.5 141.27 ...
*Saturday, February 20, 2016 by Anonymous*

**Statistic**

Your search for statistics test questions a professor is trying to convince her colleagues that peer tutoring works. she compares the results of students in two classes one with and one without the peer tutoring. for the non-tutored group the mean score fore for 35'...
*Friday, February 19, 2016 by Dhelp*

**statistics**

Minutes 126.53 127.27 130 130.35 130.4 130.58 130.87 131.18 131.98 132.55 133.28 133.42 133.43 133.55 133.65 134 134.37 134.62 134.73 135 135.95 136.12 136.17 136.23 136.28 137.7 137.83 137.93 138.18 138.25 138.43 138.67 139.13 139.72 140.25 140.38 140.4 140.42 140.5 141.27 ...
*Friday, February 19, 2016 by Anonymous*

**statistics**

Suppose the temperature of a cup of coffee is normally distributed with a mean of 142 degress F. If a cup of coffee has a z score of 1.5, which of the following is true?
*Friday, February 19, 2016 by PLZ HELP*

**Statistics**

The distribution of student loan amounts for students is normally distributed ranging from zero to $100,000. Use your knowledge of the Empirical Rule to approximate the standard deviation of the dataset? A) approximately $21,000 B) approximately $12,500 C) approximately $19,...
*Friday, February 19, 2016 by Anonymous*

**Statistics**

If, for a given sample size, 10% of all possible confidence intervals do not contain the unknown population parameter value, what is your confidence level?
*Friday, February 19, 2016 by Anonymous*

**Statistics**

Country Insurance wants to estimate the cost of damage to cars due to accidents. The population standard deviation of the cost is assumed at $200. They want to estimate the mean cost using a 95% confidence interval with a maximum margin of error of $10. What is the minimum ...
*Friday, February 19, 2016 by Anonymous*

**Statistics**

ATM transaction times are normally distributed with a mean of 150 seconds and a standard deviation of 45 seconds. What is the probability a person takes less than 60 seconds to complete their transaction?
*Friday, February 19, 2016 by Anonymous*

**statistics**

Two cards selected from standard deck of 52 cards. The first is replaced before second card selected. Find the probability of selecting a diamond and then a king
*Thursday, February 18, 2016 by tim*

**Statistics**

The following is a histogram (right skewed) of the first ten terms of a geometric distribution with p = .4. The mean of this distribution is 2.5 and the standard deviation is approximately 1.93. What's the shape of the distribution of sample means for simple random samples...
*Thursday, February 18, 2016 by Jim*

**Statistics**

What is the difference between the population distribution, the distribution of the same, and the sampling distribution and what are the formulas to get the normal distribution of each?
*Tuesday, February 16, 2016 by Sara*

**statistics **

FBM 124 class consists of 10 male and 12 female students. Two students were chosen to represent the university to an international forum. Compute the probability of choosing (a) two female students (b) no more than 1 male student c)same genders students
*Tuesday, February 16, 2016 by Anonymous*

**Statistics**

A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows: one column has number of service calls (X) those numbers are 0 1 2 3 4 5. The next column Probability P (X) those numbers ...
*Saturday, February 13, 2016 by Karen*

**Statistics**

A sample of size 16 is taken from a normally distributed population with a mean of 12 and a standard deviation of 3. The probability that the sample mean is equal to 12 is a. 1 b. 0.5 c.-0.5 d.0 please explain
*Friday, February 12, 2016 by Sara*

**statistics**

Scores: 5,2,4,2 ΣX-2 Σ(X-2) Σ(X-2)^2 can you show me a better idea how to solve this thanks
*Thursday, February 11, 2016 by bob*

**Statistics **

When a new machine is functioning properly, only 2% of the items produced are defective. If 5 parts are randomly selected from this production process, what is the probability that at most 1 defective item is in the sample?
*Wednesday, February 10, 2016 by lonestar college*

**Statistics**

2.5 Points 30% of the fifth grade students in a large school district read below grade level. The distribution of sample proportions of samples of 100 students from this population is normal with a mean of 0.30 and a standard deviation of 0.045. Suppose that you select a ...
*Wednesday, February 10, 2016 by Amy*

**statistics**

A play contains 15 speaking roles, 10 of them female and 5 male. If the director can choose among 16 female actors and 9 male actors to fill the roles, how many different casts are possible? (NOTE: A cast includes BOTH the actor AND the role that they play.) I'm just ...
*Monday, February 8, 2016 by McKinsley*

**Statistics**

We are managing a large soy bean farm. To estimate our revenues for the coming year, we need to estimate our crop yield. Soy bean yields are measured by pods/plant. We are planning for a yield of 40 pods/plant. a. We take a random sample of 64 soy bean plants and get a sample ...
*Monday, February 8, 2016 by Sara*

**Statistics**

A school experiments with two teaching approaches for mathematics. In one classroom the material is taught using lectures only. In the other classroom lectures are mixed in with the use of manipulatives, computers, and collaborative activities. Do the data below support the ...
*Monday, February 8, 2016 by Denise*

**Statistics**

A school experiments with two teaching approaches for mathematics. In one classroom the material is taught using lectures only. In the other classroom lectures are mixed in with the use of manipulatives, computers, and collaborative activities. Do the data below support the ...
*Monday, February 8, 2016 by Denise*

**statistics**

A sign is posted in an elevator stating that the maximum number of people allowed is 25, and that the maximum weight capacity is 4000lbs. Suppose the distribution of the variable Weight (among the population using the elevator) is normal with mean 150lbs and standard deviation...
*Sunday, February 7, 2016 by Kara*

**statistics**

1. Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and a standard deviation of 4. Do not use the web calculator to answer the following questions. Instead, use the Z distribution table below and ...
*Saturday, February 6, 2016 by Anonymous*

**statistics**

the ages of the members of a gym have a mean of 44 years and a standard deviation of 12 years. what can you conclude from Chebyshev's theorem about the percentage of gym members aged between 26 and 62?
*Saturday, February 6, 2016 by dianne*

**statistics**

"using the descriptive statistics for the weight of the babies in ounces, suppose a friend of yours has given birth to a 10 pound 3 ounce baby"
*Saturday, February 6, 2016 by Perry*

**Statistics**

A distribution of test scores of 600 examinees follows a normal distriburion with an everage of 80 having a standard deviation 12, how many examinees would you expect to find above a score of 100?
*Friday, February 5, 2016 by noel*

**Statistics**

Sickle cell anemia is a genetic blood disorder where red blood cells lose their ﬂexibility and assume an abnormal, rigid, "sickle" shape, which results in a risk of various complications. If both parents are carriers of the disease, then a child has a 25% ...
*Friday, February 5, 2016 by Neveah*

**Statistics**

Achusband and wife with brown eyes who have 0.75 probability of having children with brown eyes, 0.125 probability of having children with blue eyes, and 0.125 probability of having children with green eyes. (a) What is the probability that their ﬁrst child will have ...
*Friday, February 5, 2016 by Neveah*

**Statistics **

A population =100 and sd=25. A sample (n=150) has X=102. Using 2 tails of the sampling distribution and the .05 criterion. What is the critical value? Is the sample in the region of rejection? What does this indicate about the likelihood of this sample occurring in this ...
*Thursday, February 4, 2016 by Pam*

**Basic Statistics**

home / study / questions and answers / math / statistics and probability / the manager of a vacation resort has claimed that, ... Question The manager of a vacation resort has claimed that, on average, a guest spends at least $1600 at the resort during a one week stay, ...
*Thursday, February 4, 2016 by Jameson *

**Statistics**

Suppose that in the city in which the survey is conducted, 50% of adults are married, 15% are single, 25% are divorced, and 10% are widowed. a. Assign probabilities to each simple event in the sample space. b. Which approach did you use in part (a)? Find the probabilities of ...
*Thursday, February 4, 2016 by XYZ*

**Statistics**

If a teacher is grading on a curve, the median is 78 and the standard deviation is 9.6, how do i find out the ranges for grades? ex, an A is the top 15% of the curve. I know it has to do with the z score and that is the # of standard deviations the score is from the median, ...
*Wednesday, February 3, 2016 by Julie*

**Statistics**

A survey asks adults to report their marital status. The sample space is S = {single, married, divorced, widowed} . Use set notation to represent the event the adult is not married. This is what I think is the answer Married = {single, divorced, widowed}
*Wednesday, February 3, 2016 by XYZ*

**Statistics**

Arachnophobia. A 2005 Gallup Poll found that 7% of teenagers (ages 13 to 17) suffer from arachnophobia and are extremely afraid of spiders. At a summer camp there are 10 teenagers sleeping in each tent. Assume that these 10 teenagers are independent of each other.52 (a) ...
*Wednesday, February 3, 2016 by Anonymous*

**Biostatitics**

Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database, an estimate of the percentage of adults who indicated to have at some point of their life been tested for HIV is 32 percent of U.S. adults in the...
*Monday, February 1, 2016 by ayo*

**Statistics**

Suppose that IQ scores have a bell-shaped distribution with a mean of 99 and a standard deviation of 12. Using the empirical rule, what percentage of IQ scores are less than 87? Please do not round your answer. 87-99 = -12/12 = -1 I get stuck here. I know 1 standard deviation ...
*Monday, February 1, 2016 by Comet*

**statistics**

You measure 64 children , obtaining a X of 57.28 . The mean is 56 and sd is 8 Slug says that bc this X is so close to the mean of 56 , this sample could hardly be considered gifted. A. Perform the appropriate statistical procedure to determine whether he is correct B. In what ...
*Sunday, January 31, 2016 by pam*

**statistics, probability**

Consider two events A and B in the same sample space such that P(A)=0.4 and P(B)=0.3. Then A and B are mutually exclusive.
*Sunday, January 31, 2016 by Vasya*

**Behavioral Statistics**

Because Foofy's score had a relative frequency of .02, she claims she had one of the highest scores on the exam. Why is she correct or incorrect?
*Sunday, January 31, 2016 by Nik*

**statistics**

You measure 64 children, obtaining a X of 57.28. Slug says that bc this X is so close to the mean of 56, this sample could hardly be considered gifted . A. Perform the appropriate statical procedure to determine whether he is correct. B. In what percentage of the top scores is...
*Saturday, January 30, 2016 by pam*

**statistics**

Company stock price of which has risen so that over the past ten trading days , it's mean selling price is $ 14.89 . Over the years the mean price of the stock has been 10.43 ( sigma = 5.60 ) you wonder if the mean selling price is over the next ten days to go higher . ...
*Saturday, January 30, 2016 by pam*

**statistics**

For the data 95 10 7 9 10 11 8 12 7 6 9, find the raw scores that correspond to the following : z= +1.22; z= -0.48
*Saturday, January 30, 2016 by pam*

**Statistics**

Suppose that for x = 3, the predicted value is y = 7. The data pair (3, 10) is part of the sample data. What is the value of the residual for x = 3?
*Thursday, January 28, 2016 by mike*

**Statistics**

A study was conducted to investigate the relationship between the resale price, y (in hundreds of dollars), and the age, x (in years), of midsize luxury American automobiles. The equation of the line of best fit was determined below. y = 179.3 − 20.78x (a) Find the ...
*Thursday, January 28, 2016 by Greg*

**statistics**

Identify the conditions of the independent variable , the dependent variable , their scales of measurement , which measure of central tendency and variability to compute and which scores you would use in the computation . We test whether participants laugh longer ( in seconds...
*Saturday, January 23, 2016 by pam*

**statistics**

Ms.Sue What 2 aspects of the data determine which measure of central tendency use?
*Thursday, January 21, 2016 by pam*

**statistics**

What 2 aspects of the data determine which measure of central tendency use?
*Thursday, January 21, 2016 by pam*

**Statistics**

Hello, I need to analyze an experiment... could you help me? Stewart Fist reported the results of an experiment investigating the link between cell phone use and tumors in mice. the study exposed 100 mice to cell phone radiation for 2 1/2 hour periods each day for 18 months. ...
*Thursday, January 21, 2016 by Scarlett*

**statistics**

A customer service division of a telecommunications firm receives 100 mobile phones for repair on a particular week. 18 of the phones are less than a year, 60 phones are more than a year but less than 2 years and the rest are older than 2 years. The company provides warranty ...
*Wednesday, January 20, 2016 by Anonymous*

**probability and statistics**

how many different plate numbers can be made using the letters A,B and numbers 0,1,2,3 if each must contain 2 letters and 3 numbers.
*Wednesday, January 20, 2016 by jhay*

**statistics/ mean median mode**

What 2 aspects of data determine which measure of central tendency to use ?
*Tuesday, January 19, 2016 by pam*

**statistics/ mean median mode**

Describe one personal score for each type of measurement scale (ratio, interval , ratio, ordinal) how the score relates/related to the appropriate measure of central tendency (mean, mode, median ). Miles per month that you spend commuting GPA of several terms/year Average ...
*Tuesday, January 19, 2016 by pam*

**statistics/ mean median mode**

1. What two aspects of the data determine which measure of central tendency to use? 2. Why is it best to use the mean with a normal distribution ? Questions are from chapter 4 Basic Statistics for the Behavioral Sciences 7th edition
*Tuesday, January 19, 2016 by pam*

**statistics **

1. What two aspects of data determine which measure of central tendency to use? 2. Why is it best to use the mean with a normal distribution ?
*Tuesday, January 19, 2016 by pam*

**Statistics**

What do i do to calculate the 25% mean of 50 variables? Like, how many do I take away from the smallest and largest sides?
*Tuesday, January 19, 2016 by Anne*

**Statistics **

The intermediate answers from some calculations based on whole number scores are X= 4.3467892 and Y= 3.3333. For the next step, after rounding, what values of X and Y do we use?
*Sunday, January 17, 2016 by Pam*

**STATISTICS **

A random sample of clients at a weight loss center were given a dietary supplement to see if it would promote weight loss. The center reported that the 100 clients lost an average of 34 pounds, and that a 95% confidence interval for the mean weight loss this supplement ...
*Friday, January 15, 2016 by Anonymous*

**statistics**

in a shipment of 7 items there are three defective items. at random 4 items are selected what is the expected number of defective items?
*Friday, January 15, 2016 by arun*

**statistics**

5 men, 1 woman and a chold are to be seated around a round table with seven seats. Find the no. of ways they may have be arranged if the woman and the child must sit together.
*Friday, January 15, 2016 by im*

**statistics**

A marketing research shows that for every 100 flyers distributed to potential customers, 1.2 customers will be captured. If 10000 flyers are being distributed, find a. the probability that 150 customers are captured b. the expected value of this probability distribution
*Tuesday, January 12, 2016 by Anonymous*

**Statistics**

what is the standard deviation for 57,61,57,57,58,57,61
*Sunday, January 10, 2016 by jean*

**Statistics**

Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81,82,83,83,88,89,94. When I used the TI-84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3-Q1=82.5-72.5=10 But.. When I created a stem and leaf plot I found that Q2= (78+79)/2 =78....
*Thursday, January 7, 2016 by Sanaya*

**Statistics**

Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81,82,83,83,88,89,94. When I used the TI-84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3-Q1=82.5-72.5=10 But.... When I created a stem and leaf plot I found that Q2= (78+79)/2 =...
*Thursday, January 7, 2016 by Sanaya*

**Statistics **

Will somebody help me find statistics on the spread of AIDS from its discovery to the present?
*Wednesday, January 6, 2016 by Victoria*

**statistics**

The pie chart below shows how the total annual income for a certain family is spent. If the total annual income is , what amount is budgeted for Savings and Insurance combined?
*Monday, January 4, 2016 by donna*

**Statistics**

The coefficient of correlation between the age and blood pressure of a sample of 8 persons was found to be +0.8, the average age is 50 years and average blood pressure is 60. Their standard deviations were 5 and 10 respectively. a) Obtain the two regression equations b) find ...
*Saturday, January 2, 2016 by Sara*