An experiment samples two independent populations X and Y. • X is sampled 15 times yielding sample mean •Y is sampled 28 times yielding sample mean j = 26.5 and sample std dev s, = 8.9. Do a one-tailed, two-sample t-test against Ho: Hx -HY 23 and sample std dev s, = 6.6. %3D 1. In this case, the sample mean difference is 23-26.5 %3D The alternative hypothesis for the one-tailed test in this case is HA: HX -HY v1.

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An experiment samples two independent populations X and Y.
• X is sampled 15 times yielding sample mean
•Y is sampled 28 times yielding sample meang = 26.5 and sample std dev s, = 8.9.
Do a one-tailed, two-sample t-test against
Ho: Hx - Hy = 1.
23 and sample std dev 8
6.6.
%3D
%3D
%3D
%3D
In this case, the sample mean difference is
I-j=23-26.5
%3D
The alternative hypothesis for the one-tailed test in this case is
HA: Px - HY
v 1.
The sample std dev of (X-Y) is
%3D
The test statistic has distribution
Your answer must be an integer. Use the R-window as a calculator to compute.
In this case, the test statistic has value
t =
This has p-value
Transcribed Image Text:An experiment samples two independent populations X and Y. • X is sampled 15 times yielding sample mean •Y is sampled 28 times yielding sample meang = 26.5 and sample std dev s, = 8.9. Do a one-tailed, two-sample t-test against Ho: Hx - Hy = 1. 23 and sample std dev 8 6.6. %3D %3D %3D %3D In this case, the sample mean difference is I-j=23-26.5 %3D The alternative hypothesis for the one-tailed test in this case is HA: Px - HY v 1. The sample std dev of (X-Y) is %3D The test statistic has distribution Your answer must be an integer. Use the R-window as a calculator to compute. In this case, the test statistic has value t = This has p-value
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