The owner of a local Karaoke Bar has recently surveyed a random sample of n = 300 customers of the bar. She would now like to determine whether or not the mean age of her customers is over 35 . If so, she plans to alter the entertainment to appeal to an older crowd. If not, no entertainment changes will be made. If she wants to be 99 confident in her decision, what rejection region she use if the population standard deviation is known?
a. Reject H0 if z < -2.33
b. Reject H0 if z < -2.58
c. Reject H0 if z > 2.33
d. Reject H0 if z > 2.58
Question 2
To apply the Wilcoxon rank sum test to determine whether the location of population 1 is different from the location of population 2, the samples must be independent.
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