Author Question: Suppose that 10 observations are drawn from a normal population whose variance is 64 . The ... (Read 111 times)

Evvie72 · **on:** Jun 24, 2018

Suppose that 10 observations are drawn from a normal population whose variance is 64 . The observations are: 58, 62, 45, 50, 59, 65, 39, 40, 41, and 52 . Test at the 10 level of significance to determine if there is enough evidence to conclude that the population mean is greater than 45.

Question 2

Comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B, in order to make a general assessment of relative fertilizer effectiveness, may well call for a:
a. Friedman test. c. Wilcoxon rank-sum test.
b. Kruskal-Wallis test. d. Spearman rank correlation test.

cuttiesgirl16 · **Reply #1 on:** Jun 24, 2018

Answer to Question 1

H0: = 45, H1: > 45
Test statistic: z = 2.41
p-value = 0.008
Reject H0 . Yes, there is enough statistical evidence at the 10 significance level to conclude that the population mean is greater than 45.

Answer to Question 2

C