1) There is interest at the American Savings and Loan as to whether there is a difference between average daily balances in checking accounts that are joint accounts (two or more members per account) versus single accounts (one member per account). To test this, a random sample of checking accounts was selected with the following results: Single Accounts n = 20 s = $256 x = $1,123 Joint Accounts n = 30 s = $300 x = $1,245 Based upon these data, assuming that the populations are normally distributed with equal variances, the test statistic for testing whether the two populations have equal means is approximately -1.49.
1) There is interest at the American Savings and Loan as to whether there is a difference between average daily balances in checking accounts that are joint accounts (two or more members per account) versus single accounts (one member per account). To test this, a random sample of checking accounts was selected with the following results: Single Accounts n = 20 s = $256 x = $1,123 Joint Accounts n = 30 s = $300 x = $1,245 Based upon these data, assuming that the populations are normally distributed with equal variances, the test statistic for testing whether the two populations have equal means is approximately -1.49.
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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Transcribed Image Text:1) There is interest at the American Savings and Loan as to whether there is a difference between average daily
balances in checking accounts that are joint accounts (two or more members per account) versus single accounts
(one member per account). To test this, a random sample of checking accounts was selected with the following
results:
Single Accounts
n = 20
s = $256
|Joint Accounts
n = 30
s = $300
x = $1,245
x = $1,123
Based upon these data, assuming that the populations are normally distributed with equal variances, the test
statistic for testing whether the two populations have equal means is approximately -1.49.
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