You would like to construct a 90% 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 76. ? (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 90% confidence interval for the population mean. (In the table, z refers to a standard normal distribution, and i refers to a t distribution.) Could use Sampling scenario Unclear either Z or ! ? The sample has size 12, and it is from a population with a distribution about which we know very little. The sample has size 17, and it is from a normally distributed O O population with an unknown standard deviation. The sample has size 75, and it is from a non-normally distributed population with a known standard deviation of 77.

You would like to construct a 90% 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 76. ? (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 90% confidence interval for the population mean. (In the table, z refers to a standard normal distribution, and i refers to a t distribution.) Could use Sampling scenario Unclear either Z or ! ? The sample has size 12, and it is from a population with a distribution about which we know very little. The sample has size 17, and it is from a normally distributed O O population with an unknown standard deviation. The sample has size 75, and it is from a non-normally distributed population with a known standard deviation of 77.

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Description: You would like to construct a 90% confidence interval to estimate thepopulation mean score on a nationwide examination in psychology, andfor this purpose we choose a random sample of exam scores. Thesample we choose has a mean of 513 and a standard

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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