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You would like to construct a 95% confidence interval to estimate the population mean score on a nationwide examination in psychology, and for this purpose we choose a random sample of exam scores. The sample we choose has a mean of 513 and a standard deviation of 70. (a) What is the best point estimate, based on the sample, to use for the population mean? (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 95% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and t refers to a t distribution.) Could use Sampling scenario Z t Unclear either Z or t The sample has size 105, and it is from a non-normally distributed population. The sample has size 13, and it is from a normally distributed population with a known standard deviation of 78. The sample has size 10, and it is from a normally distributed population with an unknown standard deviation.

You would like to construct a 95% confidence interval to estimate the population mean score on a nationwide examination in psychology, and for this purpose we choose a random sample of exam scores. The sample we choose has a mean of 513 and a standard deviation of 70. (a) What is the best point estimate, based on the sample, to use for the population mean? (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 95% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and t refers to a t distribution.) Could use Sampling scenario Z t Unclear either Z or t The sample has size 105, and it is from a non-normally distributed population. The sample has size 13, and it is from a normally distributed population with a known standard deviation of 78. The sample has size 10, and it is from a normally distributed population with an unknown standard deviation.

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
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You would like to construct a 95% confidence interval to estimate the population mean score on a nationwide examination in psychology, and for this purpose we choose a random sample of exam scores. The sample we choose has a mean of 513and a standard deviation of 70

.

(a) What is the best point estimate, based on the sample, to use for the population mean?

Also please help with question b as well

Españo You would like to construct a 95% confidence interval to estimate the population mean score on a nationwide examination in psychology, and for this purpose we choose a random sample of exam scores. The sample we choose has a mean of 513 and a standard deviation of 70. (a) What is the best point estimate, based on the sample, to use for the population mean? (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 95% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and t refers to a t distribution.) Could use Sampling scenario t Unclear either Z or t The sample has size 105, and it is from a non-normally distributed population. The sample has size 13, and it is from a normally distributed population with a known standard deviation of 78. The sample has size 10, and it is from a normally distributed population with an unknown standard deviation.
Transcribed Image Text:Españo You would like to construct a 95% confidence interval to estimate the population mean score on a nationwide examination in psychology, and for this purpose we choose a random sample of exam scores. The sample we choose has a mean of 513 and a standard deviation of 70. (a) What is the best point estimate, based on the sample, to use for the population mean? (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 95% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and t refers to a t distribution.) Could use Sampling scenario t Unclear either Z or t The sample has size 105, and it is from a non-normally distributed population. The sample has size 13, and it is from a normally distributed population with a known standard deviation of 78. The sample has size 10, and it is from a normally distributed population with an unknown standard deviation.
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