Question

9) A business was attempting to measure if increased advertising led to more online sales revenue. Data shows that the average monthly sales revenue were $100,000,000 prior to the new campaign. Please write a null and alternative hypothesis that would guide the research.

10) If the above business owner was only concerned about if the sales revenue increased how would you express the null and alternative hypothesis?

14) Using the p-value rule, if a null hypothesis is rejected at a significance level of .01, it will ________ be rejected at a significance level of .05.

A) always

B) sometimes

C) never

15) Using the p-value rule, if a null hypothesis is not rejected at a significance level of .05, it will ________ be rejected at a significance level of .01.

A) always

B) sometimes

C) never

Answer 1

9) The hypothesis is

where is the online sales revenue.

10) Let and be the sales revenue before and after the campaign then the hypothesis is

14) Using the p-value rule, if a null hypothesis is rejected at a significance level of .01, it will always be rejected at a significance level of .05. Because the p-value must have been less than 0.01.

15)  Using the p-value rule, if a null hypothesis is not rejected at a significance level of .05, it will sometimes be rejected at a significance level of .01. Because the p-value may be between 0.01 and 0.05.