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According to a report from a business intelligence company, smartphone owners are using an average of 16 apps per month. Assume that number of apps used per month by smartphone ow distributed and that the standard deviation is 7. Complete parts (a) through (d) below. a. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? (Round to three decimal places as needed.) b. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15 and 16? (Round to three decimal places as needed.) c. If you select a random sample of 144 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? needed)

According to a report from a business intelligence company, smartphone owners are using an average of 16 apps per month. Assume that number of apps used per month by smartphone ow distributed and that the standard deviation is 7. Complete parts (a) through (d) below. a. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? (Round to three decimal places as needed.) b. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15 and 16? (Round to three decimal places as needed.) c. If you select a random sample of 144 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? needed)

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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According to a report from a business intelligence company, smartphone owners are using an average of 16 apps per month. Assume that number of apps used per month by smartphone owm distributed and that the standard deviation is 7. Complete parts (a) through (d) below. a. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? (Round to three decimal places as needed.) b. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15 and 16? (Round to three decimal places as needed.) c. If you select a random sample of 144 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? (Round to three decimal places as needed.) d. Explain the difference in the results of (a) and (c). The sample size in (c) is greater than the sample size in (a), so the standard error of the mean (or the standard deviation of the sampling distribution) in (c) is than in (a). As the standard values become more concentrated around the mean. Therefore, the probability that the sample mean will fall close to the population mean will always when the sample s View instructor tip Help me solve this Get more help - 76°F P Type here to search & 8. esc 7. @ 3. 4
Transcribed Image Text:According to a report from a business intelligence company, smartphone owners are using an average of 16 apps per month. Assume that number of apps used per month by smartphone owm distributed and that the standard deviation is 7. Complete parts (a) through (d) below. a. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? (Round to three decimal places as needed.) b. If you select a random sample of 25 smartphone owners, what is the probability that the sample mean is between 15 and 16? (Round to three decimal places as needed.) c. If you select a random sample of 144 smartphone owners, what is the probability that the sample mean is between 15.5 and 16.5? (Round to three decimal places as needed.) d. Explain the difference in the results of (a) and (c). The sample size in (c) is greater than the sample size in (a), so the standard error of the mean (or the standard deviation of the sampling distribution) in (c) is than in (a). As the standard values become more concentrated around the mean. Therefore, the probability that the sample mean will fall close to the population mean will always when the sample s View instructor tip Help me solve this Get more help - 76°F P Type here to search & 8. esc 7. @ 3. 4
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