MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:Words were displayed on a computer screen with background colors of red and blue. Results from scores on a test of word recall are given below. Use a 0.05 significance level to test the claim that
the samples are from populations with the same standard deviation. Assume that both samples are independent simple random samples from populations having normal distributions. Does the
background color appear to have an effect on the variation of word recall scores?
Red Background
Blue Background
What are the null and alternative hypotheses?
OA H₂:0²=0²₂2
H₁: 0²1 20²2
n
X
S
34 15.35 5.94
37 12.49 5.43
*C. H₂:0² = 0²/
c.
H₁:0² #0²/2
Identify the test statistic.
F = (Round to two decimal places as needed.)
***
B. H₂:0² = 0²
H₁:0² <0²
OD. H₂:0² #0²/2
H₁:0² = 0²
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