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According to Quantcast analytics of CrossFit.com, 59% of CrossFitters have children. Suppose we take a random sample of 40 Crossfitters and find the sample proportion (p) that have children. We repeat this process many times. (a) What do you expect the mean of the p's to be? (b) What do you expect the standard deviation of the p's to be?

According to Quantcast analytics of CrossFit.com, 59% of CrossFitters have children. Suppose we take a random sample of 40 Crossfitters and find the sample proportion (p) that have children. We repeat this process many times. (a) What do you expect the mean of the p's to be? (b) What do you expect the standard deviation of the p's to be?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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75 a and b

117 words. (a) What do you expect the mean of the 's to be? (b) What do you expect the standard deviation of the 's to ber () What do you expect the shape of the a's to be? What guarantees this lac a mean of $1553 and a standard deviation of $329. for a random sample of 50 students? (b) What is the probability that a randomly selected on-campus student spends more tha $1200 per semester? (C) What is the probability that a random sample of 50 students spends an average of less blaL $1500? (d) What is the probability that a random sample of 50 students spends an average of $1450 to $1600 per semester? 74. Sunshine City was designed to attract retired people, and its current population of 50,000 residents has a mean age of 60 years and a standard deviation of 16 years. The distribution of ages is skewed to the left. (a) What is the distribution of the sample mean age of residents for a random sample of 100 residents? (b) What is the probability that a random sample of 100 residents have a mean age between 50 and 70 years of age? What is the probability that the mean age of a random sample of 100 residents is less than 55? 75. According to Quantcast analytics of CrossFit.com, 59% of CrossFitters have children. Suppose we take a random sample of 40 Crossfitters and find the sample proportion (p) that have children. We repeat this process many times. (a) What do you expect the mean of the p's to be? (b) What do you expect the standard deviation of the p's to be? (c) What do you expect the shape of the p's to be? 76. According to Quantcast analytics of CrossFit.com, 40% of CrossFitters have post-graduate de- grees. Suppose we take a random sample of 60 Crossfitters. (a) Describe the sampling distribution of the sample proportion of CrossFitters who have post- graduate degrees for samples of size 60.
Transcribed Image Text:117 words. (a) What do you expect the mean of the 's to be? (b) What do you expect the standard deviation of the 's to ber () What do you expect the shape of the a's to be? What guarantees this lac a mean of $1553 and a standard deviation of $329. for a random sample of 50 students? (b) What is the probability that a randomly selected on-campus student spends more tha $1200 per semester? (C) What is the probability that a random sample of 50 students spends an average of less blaL $1500? (d) What is the probability that a random sample of 50 students spends an average of $1450 to $1600 per semester? 74. Sunshine City was designed to attract retired people, and its current population of 50,000 residents has a mean age of 60 years and a standard deviation of 16 years. The distribution of ages is skewed to the left. (a) What is the distribution of the sample mean age of residents for a random sample of 100 residents? (b) What is the probability that a random sample of 100 residents have a mean age between 50 and 70 years of age? What is the probability that the mean age of a random sample of 100 residents is less than 55? 75. According to Quantcast analytics of CrossFit.com, 59% of CrossFitters have children. Suppose we take a random sample of 40 Crossfitters and find the sample proportion (p) that have children. We repeat this process many times. (a) What do you expect the mean of the p's to be? (b) What do you expect the standard deviation of the p's to be? (c) What do you expect the shape of the p's to be? 76. According to Quantcast analytics of CrossFit.com, 40% of CrossFitters have post-graduate de- grees. Suppose we take a random sample of 60 Crossfitters. (a) Describe the sampling distribution of the sample proportion of CrossFitters who have post- graduate degrees for samples of size 60.
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