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9. It has been suggested that night shift-workers show more variability in their output levels than...

9.

It has been suggested that night shift-workers show more variability in their output levels than day workers (σ2N > σ2D). Below, you are given the results of two independent random samples

Hypothesis Test for Two Populations including

  • t-Test for μ1-μ1
  • t-Test for μd
  • F-Test for
Night Shift (N) Day Shift (D)
Sample Size 9 8
Sample Mean 520 540
Sample Variance 38 20

State the alternative hypotheses (HA) to be tested.

Group of answer choices

a.

b.

c.

d.

math   Statistics-And-Probability   
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Answer #1

Given that,

F-Test for

This is the right tailed test .

The alternative hypothesis is ,

Ha : 12 > 22

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