(a) What is the best point estimate, based on the sample, to use for the population mean? ? O ollars (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 99% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and refers to at distribution.) Could use Sampling scenario Undear either Z or t ? The sample has size 17, and it is from a normally distributed population with a known standard deviation of 0.26. The sample has size 80, and it is from a non-normally distributed population. The sample has size 13, and it is from a normally distributed population with an unknown standard deviation.
(a) What is the best point estimate, based on the sample, to use for the population mean? ? O ollars (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 99% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and refers to at distribution.) Could use Sampling scenario Undear either Z or t ? The sample has size 17, and it is from a normally distributed population with a known standard deviation of 0.26. The sample has size 80, and it is from a non-normally distributed population. The sample has size 13, and it is from a normally distributed population with an unknown standard deviation.
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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Question
![You would like to construct a 99% confidence interval to estimate the population mean price of milk (per gallon) in your city. You select a random sample of
prices from different stores. The sample has a mean of 3.66 dollars and a standard deviation of 0.20 dollars.
(a) What is the best point estimate, based on the sample, to use for the population mean?
O dollars
(b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value
for the 99% confidence interval for the population mean.
(In the table, Z refers to a standard normal distribution, and t refers to at distribution.)
Could use
Sampling scenario
Unclear
either Z or t
The sample has size 17, and it is from a normally distributed
population with a known standard deviation of 0.26.
The sample has size 80, and it is from a non-normally distributed
population.
The sample has size 13, and it is from a normally distributed
population with an unknown standard deviation.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Febcf9de3-24cc-40b0-a023-15a9096e4963%2Fe3f0306e-90c3-4ac3-8a56-2f2a2ed92064%2Fsq1wxb_processed.png&w=3840&q=75)
Transcribed Image Text:You would like to construct a 99% confidence interval to estimate the population mean price of milk (per gallon) in your city. You select a random sample of
prices from different stores. The sample has a mean of 3.66 dollars and a standard deviation of 0.20 dollars.
(a) What is the best point estimate, based on the sample, to use for the population mean?
O dollars
(b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value
for the 99% confidence interval for the population mean.
(In the table, Z refers to a standard normal distribution, and t refers to at distribution.)
Could use
Sampling scenario
Unclear
either Z or t
The sample has size 17, and it is from a normally distributed
population with a known standard deviation of 0.26.
The sample has size 80, and it is from a non-normally distributed
population.
The sample has size 13, and it is from a normally distributed
population with an unknown standard deviation.
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