We want to test if there is a difference in the amount the families in the two cities spend on utilities. Ho: Ha: Pooled variance = What decision should be made?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Independent random samples from two neighboring cities revealed the following
information concerning the average amount of money spent on single family home
utility bills during July. Assume normal populations using a .05 level of significance.
City B
25 families
City A
Sample Size
Average Bill
Sample Standard Deviation
25 families
$260
$20
$250
$23
We want to test if there is a difference in the amount the families in the two cities
spend on utilities.
Н:
На:
Pooled variance =
What decision should be made?
Transcribed Image Text:Independent random samples from two neighboring cities revealed the following information concerning the average amount of money spent on single family home utility bills during July. Assume normal populations using a .05 level of significance. City B 25 families City A Sample Size Average Bill Sample Standard Deviation 25 families $260 $20 $250 $23 We want to test if there is a difference in the amount the families in the two cities spend on utilities. Н: На: Pooled variance = What decision should be made?
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