6. If the decision is to reject the null hypothesis of no difference between two population
parameters, at the 5% level of significance, what are examples of the alternate hypothesis
and rejection region?
A) ?1 ?2 ; z > 1.65 and z < negative 1.65
B) ?1 ?2
MAT 155 Estimation and Confidence Intervals
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CHAPTER 7 Estimates, Sample Sizes, and Confidence Intervals
The following notes were taken from the PowerPoint slides for this chapter and
supplemented as appropriate to make the no
The mean amount of gasoline and services charged by Key Refining Company credit customers is $70 per
month. The distribution of amounts spent is approximately normal with a standard deviation of $10.
Compute the probability of s