Wednesday

April 16, 2014

April 16, 2014

Number of results: 477,282

**economyst check!**

In many families both parents work, as a result there is increasing need for day care. Data was collected; and one year in Canada approximately 32% of children aged 0 to 11 years were in day care for at least 20h per week. What is the probability, in a random poll of 60 ...
*Thursday, June 7, 2007 at 4:53pm by stats!*

**Stats...is this correct?**

A sample of purchases at the local convenience store has resulted in the following sample data, where x = the number of items purchased per customer and f = the number of customers. x 1 2 3 4 5 f 5 15 8 8 7 1. What does the 15 stand for in the above table? 2. Find the midrange...
*Tuesday, October 18, 2011 at 9:53pm by Jen*

**Stats...is this correct??**

Scores on the Stanford-Binet Intelligence scale have a mean of 100 and a standard deviation of 16, and are presumed to be normally distributed. A person who scores 68 on this scale has what percentile rank within the population? z = (68-100)/16 z = -32/16 = -2 So would it be ...
*Tuesday, October 18, 2011 at 9:54pm by Jen*

**Stats...is this correct??**

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score. Remember that it is below the mean, and percentile rank is % ≤ that score.
*Tuesday, October 18, 2011 at 9:54pm by PsyDAG*

**Stats...is this correct?**

Looks good!
*Tuesday, October 18, 2011 at 9:53pm by PsyDAG*

**Stats...is this correct?**

Yay!! Thank u!!
*Tuesday, October 18, 2011 at 9:53pm by Jen*

**Is this right?? Stats....**

How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.20 0.16 0.28 0.24 Would it be 0.12??
*Tuesday, October 25, 2011 at 9:27am by Jennifer*

**Is this right?? Stats....**

Classify the following as discrete or continuous random variables. (A) The time it takes to run a marathon (B) The number of fractions between 1 and 2 (C) A pair of dice is rolled, and the sum to appear on the dice is recorded (D) The length of a broad jump I got: (A) ...
*Tuesday, October 25, 2011 at 9:28am by Jennifer*

**Is this right?? Stats....**

No. CDDC
*Tuesday, October 25, 2011 at 9:28am by drwls*

**Is this right?? Stats....**

great i wasn't so sure about the last 2 thank you :)
*Tuesday, October 25, 2011 at 9:28am by Jennifer*

**Is this right?? Stats....**

Since the probability of the total of all events = 1, I would say .12 also.
*Tuesday, October 25, 2011 at 9:27am by PsyDAG*

**statistics**

What does the area corresponding to the critical value zcrt mean? There is a graph that has a normal bell shape curve that has a vertical arrow that intersects the x axis far from the y axis. then everything to the left of the the vertical arrow is colored in blue. The ...
*Wednesday, March 26, 2008 at 6:48pm by stats*

**statistics**

Suppose that one in every 100 people in a certain community is infected with HIV. You want to indentify an HIV-positive person to include inn a study of an experimental new drug. How many indiviuals would you expect to have to interview in order to find the first person who is...
*Wednesday, February 10, 2010 at 11:54am by stats*

**adult education**

You are a share analyst for an investment firm and are investigating the return on shares in the Mean Corporation over the last four years. The return on Mean Corporation shares over the last four years is presented. Calculate the geometric mean rate of return (R) on Mean ...
*Saturday, October 2, 2010 at 10:06pm by Stats*

**statistics**

A group of applicants for a position consists of 8 people who are qualified and 7 whoa are not. If we select two people at random to be interviewed (obviously without replacement), find the probability that we get: a. two qualified people b. one qualified and one unqualified ...
*Wednesday, January 23, 2008 at 10:57pm by stats-help*

**AP Stats B**

B is the one without calculus I belive... anyways so descriptive statistics I\'m doing the 2004 AP Statisics AP test Section II part A like my teacher gives us old exams and this is one of those questions the question asks for a boxplot there are outliers the IQR gives me a ...
*Sunday, September 13, 2009 at 8:39pm by AP Stats B*

**Stats**

is the answerposted for this?
*Wednesday, October 31, 2007 at 3:21pm by Stephanie*

**Statistics- quick! Is this right?**

1) looks correct For 2) You have an standard error of 500, and are asked what is likelihood of similar sample being within 1000 or 2.0 standard deviations away from the mean. Look up 2.0 in your cumulative normal distribution table (probably in the back of your stats book). I ...
*Thursday, November 1, 2007 at 8:20pm by economyst*

**Stats**

The slope is zero in this situation.
*Monday, November 5, 2012 at 10:33am by MathGuru*

**stats**

there is no relative frequency in this question
*Saturday, October 29, 2011 at 3:04am by st*

**Stats**

0.05 means 5%. And this is not the answer
*Monday, July 29, 2013 at 4:46pm by Help please!!!*

**stats**

This is a one sample test. It is one sample because you aren't comparing groups, etc.
*Tuesday, March 12, 2013 at 1:49pm by Dr. Jane*

**stats**

Inadequate data. If this is from a previous post, you need to repeat the data.
*Monday, October 17, 2011 at 10:15pm by PsyDAG*

**stats**

this is what I have for the linear regression equation .614(21) +51.200=64.094
*Wednesday, May 8, 2013 at 1:20pm by Anonymous*

**Stats**

Poisson distribution (m = mean): P(x) = e^(-m) m^x / x! For (a): Take (0.028)(8) = 0.224 (this is the mean). Find P(0) using the above formula. For (b): Take (0.028)(24) = 0.672 (this is the mean). Find P(0) using the above formula. Then subtract that value from 1. This will ...
*Tuesday, February 25, 2014 at 10:27pm by MathGuru*

**Stats**

A sample has M = 72 and s = 4. In this sample, what is the X value corresponding to z = –2.00?
*Wednesday, October 31, 2007 at 3:21pm by Lisa*

**Stats**

A sample has M=72 and s=4. In this sample, what is the X value corresponding to z = -2?
*Wednesday, October 31, 2007 at 3:21pm by Jen*

**stats**

... you accept the alternate hypothesis, whatever it is. I hope this helps. If not, repost your question with more specifics.
*Thursday, April 1, 2010 at 6:58am by PsyDAG*

**Stats**

Z = 64-51/5.0 = 13/5.0 = 2.6 Z = 47-51/5.0 = -4/5.0 = -0.8 Is this correct?
*Saturday, October 15, 2011 at 12:23pm by Jennifer*

**Stats**

okay so the first would be 0.75 correct? the second one would be 3 = -16.46 -3 = -16.46 is this correct?
*Saturday, October 15, 2011 at 12:22pm by Jennifer*

**stats**

The null hypothesis in this study where μ1 = tv news group, and μ2 = radio news group is
*Wednesday, January 11, 2012 at 12:18pm by matthew*

**Stats**

The area between the mean and a Z score of +1.50 is 43.32%. This score is higher than ___ of the score in the distribution.
*Friday, February 1, 2013 at 11:30am by DeeDee*

**Stats**

Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this experiment is completed...
*Sunday, October 23, 2011 at 1:02pm by Jennifer*

**Stats**

a. What is the probability that this year will be crash free? b. If there is a crash, what is the probability that there will be more than 2?
*Thursday, January 24, 2008 at 11:03am by MoJo*

**stats**

This seems to be part of a larger question. You provide no indication of what "r" is or what proportions are being recorded.
*Friday, February 6, 2009 at 11:05pm by drwls*

**stats**

The P value is the probability that the results you have found would occur solely by chance. This should lead you to your answer. Thanks for asking.
*Tuesday, April 28, 2009 at 5:16pm by PsyDAG*

**stats**

You dont need a z-score for this problem. A normal distribution means that half the observations are above the mean, half below. The answer is 50%
*Monday, September 28, 2009 at 3:49pm by economyst*

**Stats**

The unemployment rate in a city is 9%. Find the probability that at least 2 out of 8 people from this city sampled at random are unemployed.
*Thursday, October 28, 2010 at 3:00pm by LiCee*

**Stats**

I. Dependent variable; Independent variable II. Independent variable; Independent variable III. Independent variable; Dependent variable IV. Dependent variable; Dependent variable Sorry I misread it. Is this correct?
*Tuesday, October 18, 2011 at 9:44pm by Jen*

**Stats**

what are the upper and lower limits of the variable below? upper lower 15-19 60-69 * is there a formula i need to use for this.
*Wednesday, September 12, 2012 at 12:24am by Whitney*

**STATS**

Thank you that helps a lot. I have been struggling with this. C. What percent of students weigh less than 60.1 kilograms? Z=(60.1-75.5)/10.3=-1.49 I checked the z-table and the probability is .0681. .0681*100=6.8% Is this problem correct?
*Monday, February 10, 2014 at 4:02pm by Tracy *

**Stats**

a coin is tossed twice, or until the first "tails" appears, whichever comes first. which of the following is the sample space for this random experiment? A, S=(H, T) B. S=(T, HT, HH) C. S=(T, TT)
*Thursday, February 23, 2012 at 12:02am by Justin*

**Stats**

2. The population standard deviation for the number of rolls before a 1 is observed. Use this result to construct a 90% Z-interval for the mean number of rolls required before a 1 is observed.
*Saturday, September 14, 2013 at 12:39am by Me*

**Stats**

You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 14 apartments advertised in the local newspaper is $1200. Assume that the standard deviation is $230. Find a 95% confidence interval for the mean monthly ...
*Monday, July 9, 2012 at 11:50am by James*

**stats**

A normal distribution is a distribution that is bell-shaped and symmetrical. The mean, median, and mode are measures of central tendency. In a normal distribution, all are the same value. Variance and standard deviation are two measures of variability. Standard deviation is ...
*Tuesday, October 23, 2012 at 4:46pm by MathGuru*

**Stats**

For 1): Y(hat) comes from substituting an x value into a regression equation and solving for y(hat). Y(hat) is also called the predicted y value in a regression equation. Let's use an example. Suppose the regression equation is this: y(hat) = 2.75 + .5x If x = 1, then y(hat...
*Tuesday, March 19, 2013 at 10:10pm by MathGuru*

**Stats**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*Monday, October 24, 2011 at 3:42pm by Jennifer*

**Stats**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*Tuesday, October 25, 2011 at 8:33pm by Jen*

**stats**

In testing a new drug, researchers found that 1% of all patients using it will have a mild side effect. A random sample of 12 patients using the drug is selected. Find the probability that: (A) exactly one will have this mild side effect (B) at least one will have this mild ...
*Wednesday, November 23, 2011 at 7:11pm by tina*

**Stats**

The one for which the ratio of standard deviation to mean is highest has the largest relative variation. In this case, they are both the same. (std. dev.)/mean = .250 for both
*Monday, July 28, 2008 at 8:45pm by drwls*

**Stats**

The distribution of SAT verbal scores of University X's incoming freshman class (N=950) has a mean of 475. What is the value for the sum of deviation scores from the mean of this distribution?
*Sunday, January 24, 2010 at 9:26pm by Jill*

**STATS**

Is your symbol, ƒÊ = μ = mean? Ho: μ = 700 H1: μ ≠ 700 For P = .05, need μ ± 1.96 SE SE = SD/√(n-1) I hope this helps.
*Tuesday, March 30, 2010 at 12:27am by PsyDAG*

**Stats**

a population of 8 scores has a mean of 11. If one of the scores in this population is changed from x=9 to x=25, what value would be obtained for the new population mean?
*Thursday, February 10, 2011 at 6:07pm by Anonymous*

**stats**

I scored an 85 percent on my exam. The mean score for that quiz was -83.73 and standard deviation was -24.23 what is the z score for this exam?
*Tuesday, November 29, 2011 at 11:12pm by Anonymous*

**Stats**

Regression equation is in this format: predicted y = a + bx ...where a = intercept and b = slope. Determine the equation, then substitute 2012 for x to find predicted y (forecasting the rental and leasing revenue).
*Monday, August 20, 2012 at 11:47am by MathGuru*

**Stats**

18/38 times 2/38 Black at least once is the opposite of never black.. 20/38 times 20/38 subtract this answer from 1 to get at least once for black.
*Sunday, March 10, 2013 at 3:42pm by Dr. Jane*

**Stats**

According to genetic theory, every plant of a particular species has a 25% chance of being red-flowering, independently of all other plants. Among 10 plants of this species, what is the chance that fewer than 4 are red-flowering?
*Sunday, April 28, 2013 at 5:10pm by mmpt*

**stats**

Play around with this website, it is great http://davidmlane.com/hyperstat/z_table.html click on "value from an area" enter 1 - .011 or .989 in "area" click on "below" and recalculate
*Sunday, November 17, 2013 at 8:43pm by Reiny*

**stats**

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: (I think it is 1) (1) H0 : = 3000 H1 : not= 3000 (2) H0 : > 3000 H1...
*Wednesday, March 31, 2010 at 1:21pm by joseph*

**Stats**

Fortunately, plane crashes are rare events. Suppose that commercial crashes occur on an average (mean) of 1.1 per year (Hint: Poisson). a. What is the probability that this year will be crash free? b. If there is a crash, what is the probability that there will be more than ...
*Thursday, January 24, 2008 at 11:03am by MoJo*

**Stats**

To get P = .05, Ho needs to have μ 1.96 SD, Reject Ho, if value is outside that range. P is determined by Z score = (X-μ)/SD. Look up value in "area under normal distribution" in back of your stats text. Is "that" your SD? I hope this helps. If not, repost with ...
*Friday, April 24, 2009 at 2:18am by PsyDAG*

**stats**

An automobile repair shop has determined that the average service time on an automobile is 2 hours with a standard deviation of 32 minutes. A random sample of 64 out of 400 services is selected. What is the probability that this sample will have a mean service time greater ...
*Wednesday, November 11, 2009 at 9:43pm by sandy*

**Stats**

Classify the following as discrete or continuous random variables. (A) The time it takes to run a marathon (B) The number of fractions between 1 and 2 (C) A pair of dice is rolled, and the sum to appear on the dice is recorded (D) The length of a broad jump I got: (A) ...
*Monday, October 24, 2011 at 3:41pm by Jennifer*

**stats**

The life of tires manufactured by Omega Tires Inc is believed to be normally distributed with a mean of 110,000 km and a standard deviation of 5,000 km. A random sample of 200 tires is tested . What is the problability of the mean life of this sample being between 109,000 and ...
*Tuesday, October 9, 2012 at 10:46am by Carlos*

**Stats**

4. A least squares regression line to predict a student’s Stat145 test score (from 0-to-100) from the number of hours studied was determined from a class of 55 Stat145 students: ̂ = 48.2 + 2.21x. One student in the class studied for 18 hours and scored 82 on the exam. (a...
*Friday, March 7, 2014 at 6:01pm by Tracy *

**stats**

You pick 2 M&Ms from a large bag. What is the probability that 1) at least one is brown? 2) not all are blue? brown=13% yellow=14% red=13% blue=24% orange=20% green=16% 1) P(at least one M&M is brown) = 1 - P(no M&M is brown) = 1 - (0.87) = 0.13 Is this correct? 2) P(not all M...
*Wednesday, October 14, 2009 at 3:44pm by CM*

**stats**

Ok, you have 5 cards showing, meaning 47 remain. You have 4 hearts showing, meaning 9 remain. There are 47-choose-2 ways of picking the next two cards. = 47!/2!(47-2)! =1081 possible ways. This will be the denominator. Now then, the number of ways of picking a heart and ...
*Saturday, November 21, 2009 at 7:52pm by economyst*

**stats**

3. The mean family income in Arizona is about $64,750 with a standard deviation (for the population) of $59,750. Imagine that you are taking a sample of 200 randomly selected state residents. (a) What is the probability that your sample mean is between $61,000 and $64,750? (b...
*Thursday, July 26, 2012 at 9:00pm by taylor quenzler*

**Stats**

The lifetime of a particular type of battery is normally distributed with a mean of 1100 days and a standard deviation of 80 days. The manufacturer randomly selects 400 batteries of this type and ships them to a departmental store. (a) What is the mean and standard deviation ...
*Thursday, June 5, 2008 at 10:18pm by Dherain*

**stats**

write a brief paragraph addressing the question. Which is more likely, that a person is killed by lightning, or that a person is killed by lightning while playing golf in a thunderstorm? I believe it would be while playing golf due to holding the metal golf club, acting as a ...
*Wednesday, October 14, 2009 at 3:49pm by CM*

**Stats**

Recently, an automobile insurance company performed a study of a random sample of 15 of its customers to determine if there is a positive relationship between the number of miles driven and the age of the driver. The sample correlation coefficient is r=.38. Given this ...
*Monday, June 13, 2011 at 4:12pm by Breezy*

**Stats**

Consumer Reports rated airlines and found that 80% of flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time rate is representive of the entire commercial airline industry, consider a random sample of 200...
*Tuesday, December 13, 2011 at 11:41am by Sam*

**Stats**

There are four major political parties in the country Treon. A public research group is interested in finding out whether there is any relationship between the party that is supported by a citizen of Treon and that citizen's socio-economic status. For the purposes of a study, ...
*Saturday, October 9, 2010 at 7:04am by Scott*

**Stats**

A is the symbol used, its not coming through when I type the question. I am not sure what the symbol a is suppose to represent either. I will send my professor an email, hopefully she can provide clarification on this question. Thanks for trying to help me...
*Saturday, September 13, 2008 at 5:55pm by Cassy*

**Stats**

A participant in a cognitive psychology study is given 50 words to remember and later asked to recall as many as he can of them. This participant recalls 17. What is the (a) variable, (b) possible values, and (c) score? I just don't understand what it all means. I've read the ...
*Friday, May 28, 2010 at 1:35pm by Jane*

**stats**

You are given the following information obtained from a random sample of 4 observations. 25 47 32 56 At a .05 level of significance, determine whether or not the mean of the population from which this sample was taken is significantly different from 48. (Assume the population ...
*Wednesday, December 1, 2010 at 12:47pm by sara*

**Stats **

how did you come to this answer? The answer is approximately =0.017 b) Ten Cobalts are randomly selected and the miles per gallon for each car are recorded. What is the probability that the mean miles per gallon exceed 34 miles per gallon? The final answer will be = 0.0351
*Monday, May 28, 2012 at 6:18pm by Stacey*

**stats**

The rate of chlamydia infection was reported as 2.78% in a recent year. Under certain conditions, a preliminary screening test for the chlamydia bacterium is correct 96% of the time. One person is randomly selected from the population. find the true positive. Can someone ...
*Wednesday, March 6, 2013 at 1:20am by mark*

**stats**

A popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of $30 and a standard deviation of $9. What is the probability that a randomly selected customer will spend $20 or more at this store?
*Friday, March 29, 2013 at 9:51am by cate *

**Stats**

Using acronyms (e.g., tcv, bt) means nothing unless the acronym is defined. You are assuming that we use the same acronyms that you do, which in this case is not true. I can't answer unless I know what you are asking. There should be a table of t values in the back of your ...
*Thursday, June 6, 2013 at 7:28pm by PsyDAG*

**Stats**

Poisson distribution (m = mean): P(x) = e^(-m) m^x / x! Values for (a): x = 0, 1 m = 0.63 Substitute and calculate for each x. Add those calculations together for a total probability. Then subtract that value from 1. This will give you the probability of more than one death. ...
*Tuesday, February 25, 2014 at 10:33pm by MathGuru*

**stats**

When setting up a statistical test, two hypotheses are formed: a null hypothesis and an alternate hypothesis. The null hypothesis tests the probability that the sample mean (taken from sample data) is very likely drawn from the population mean. If there is a low probability ...
*Thursday, August 18, 2011 at 4:23pm by MathGuru*

**stats**

In order to improve the English speaking and reasing skills of their students, Jack Box Elementary assigns students whose native language is Spanish to a bilingual program for 8 week. To test the effectiveness of this program, then also need a control condition, in which the ...
*Sunday, March 1, 2009 at 7:16pm by ash*

**stats ?**

In order to improve the English speaking and reasing skills of their students, Jack Box Elementary assigns students whose native language is Spanish to a bilingual program for 8 week. To test the effectiveness of this program, then also need a control condition, in which the ...
*Monday, March 2, 2009 at 11:05am by ash*

**stats**

In a poll of 100 adults, 45% reported they believed in “faith healing.” (USA Today, 20 April 1998). Based on this survey, a “95% confidence interval” for the proportion in the population who believe in faith healing is about 42% to 48%. If this poll had been based instead on ...
*Wednesday, June 23, 2010 at 5:27pm by Anonymous*

**Stats**

An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11. (a) At the 5 percent level of significance, does this ...
*Wednesday, November 3, 2010 at 3:26am by Sami*

**stats**

There are four major political parties in the country Treon. A public research group is interested in finding out whether there is any relationship between the party that is supported by a citizen of Treon and that citizen's socio-economic status. For the purposes of a study, ...
*Thursday, October 7, 2010 at 11:08pm by Gina *

**stats **

A salesperson goes door-to-door in a residential area to demonstrate the use of a new Household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) is 0.30. To perform ...
*Tuesday, June 14, 2011 at 11:05am by jenny*

**Stats**

In a study of children with a particular disorder, parents were asked to rate their child on a variety of items related to how well their child performs different tasks. One item was "Has difficulty organizing work," rated on a five-point scale of 0 to 4 with 0 corresponding ...
*Monday, July 9, 2012 at 4:28pm by James*

**stats**

I wanted to know is this a sample or population. I want to solve for the standard deviation, but I am not sure what it is. Personally I think it is a sample.These are the numbers of wins for the 30 NBA teams for the 2004-2005 NBA season. 45 43 42 33 33 54 47 44 42 30 59 45 36 ...
*Tuesday, March 10, 2009 at 8:57pm by sue*

**stats**

the p-value for a significance test is .0358. a correct interpretation of this p-value would be: a) about 3.6% of the data are significant b) about 3.6% of all samples are significant c) about 3.6% of all samples would produce a test statistic at least as extreme as ours if ...
*Tuesday, April 28, 2009 at 5:16pm by Stephanie*

**Stats **

The distribution of lifetimes for a particular brand of lightbulbs has a mean of 110 hours and a standard deviation of 20 hours. Suppose a random sample of 35 lightbulbs is taken for observation. What is the probability that the sample mean lifetime will be between 105 and 115...
*Monday, January 31, 2011 at 3:45am by Ryan*

**Stats**

Tonya wants to estimate what proportion of the students in her dormitory like the dorm food. She interviews an SRS of 50 of the 175 students living in the dormitory. She finds that 14 think the dorm food is good. a.) What population does Tonya want to draw conclusions about? ...
*Wednesday, November 9, 2011 at 9:48pm by Manda*

**Stats**

Formula to find sample size: n = [(z-value)^2 * p * q]/E^2 ... where n = sample size, z-value is found using a z-table for 99% confidence (which is 2.58), p = .5 (when no value is stated in the problem), q = 1 - p, ^2 means squared, * means to multiply, and E = 0.06 Plug ...
*Sunday, July 8, 2012 at 10:57pm by MathGuru*

**Stats**

I roll a pair of fair dice and compute the number of spots on the two sides facing up. Denote this total by X. The probability distribution of X is X Prob 2 1/36 3 2/36 4 3/36 5 4/36 6 5/36 7 6/36 8 5/36 9 4/36 10 3/36 11 2/36 12 1/36 The probability that X is an even number is
*Tuesday, July 2, 2013 at 3:28pm by MT*

**Stats**

I have done parts of this question (they are capitalized)which I was hoping someone could double check, and there are other parts that I need help on. 1. The manager of a fitness center is interested in the average weight-to-height ratio of the center's clients. Since the ...
*Friday, June 14, 2013 at 12:24pm by mysterychicken*

**STATS**

I have done parts of this question (they are capitalized)which I was hoping someone could double check, and there are other parts that I need help on. 1. The manager of a fitness center is interested in the average weight-to-height ratio of the center's clients. Since the ...
*Saturday, June 15, 2013 at 3:01pm by mysterychicken*

**stats**

An analysis is done to determine the amount spent on fresh fruits and vegetables per person per week. In a certain area, assume this amount is normally distributed with a mean of $13.9 and a standard deviation of $ 4.91. A. When finding the probability that a random person ...
*Sunday, October 10, 2010 at 2:04am by ff*

**stats**

A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of at least 26 miles per gallon. To see if the goal is being met they check the gasoline usage for 50 company trips chosen at random, finding a mean of 25.02 mpg...
*Wednesday, July 13, 2011 at 10:11am by GLEN*

**Stats**

Is this right for A) n=6 p=P(.38) q= 1-.38=.62 q=P(.62) P(x=0)= 6C0= 6!/ 0!(6-0)!= 6!/0!(6)!= 6*5*4*3*2*1/1*6*5*4*3*2*1= 720/720= 1 6C0 (.38)0 (.62)6= (1)(1)(.0568)= .0568 so P(x=0)= .0568?
*Saturday, January 23, 2010 at 11:50am by Sunny*

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