Independent random samples from normal populations produced the results shown in the next table. Sample 1 Sample 2 1.2 4.2 3.1 2.7 3.6 1.7 2.8 3.0 3.9

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Independent random samples from normal populations
produced the results shown in the next table.
Sample 1
Sample 2
1.2
3.1
1.7
4.2
2.7
3.6
2.8
3.0
3.9
a. Calculate the pooled estimate of o?.
b. Do the data provide sufficient evidence to indicate that
uz > µ1? Test using a = .10.
c. Find a 90% confidence interval for (µ1-µz).
d. Which of the two inferential procedures, the test of
hypothesis in part b or the confidence interval in part c,
provides more information about (µ1 – µz)?
Transcribed Image Text:Independent random samples from normal populations produced the results shown in the next table. Sample 1 Sample 2 1.2 3.1 1.7 4.2 2.7 3.6 2.8 3.0 3.9 a. Calculate the pooled estimate of o?. b. Do the data provide sufficient evidence to indicate that uz > µ1? Test using a = .10. c. Find a 90% confidence interval for (µ1-µz). d. Which of the two inferential procedures, the test of hypothesis in part b or the confidence interval in part c, provides more information about (µ1 – µz)?
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