Suppose a research uses the Mann-Whitney test to determine if there is a difference in the volume of text messages sent by a high school student living in a rural area versus an urban area during the month of December.Eight rural high school students and 9 urban high school students were included in the study. If,among all 17,the U statistic is 29,n₁=8 and n₂ = 9 what is the the conclusion at α=0.05 is __________ A) reject the hypothesis that the number of text messages sent in December is identical B) do not reject the hypothesis that the number of text messages sent in December is identical. C) reject the hypothesis that the average number of text messages is identical. D) do not reject the hypothesis that the average number of text messages is identical. E) accept the hypothesis that the number of text messages sent in December identical.

Question

Quizplus · Accepted Answer

Since the U statistic is 29 and the critical value of U for α=0.05 is 23, we can reject the null hypothesis that the volume of text messages sent by high school students in rural and urban areas is identical. Therefore, the conclusion is to reject the hypothesis that the number of text messages sent in December is identical.

Suppose a Research Uses the Mann-Whitney Test to Determine If