Author Question: A company makes two products, A and B. A sells for 100 and B sells for 90 . The variable production ... (Read 228 times)

Bob-Dole · **on:** Jun 24, 2018

A company makes two products, A and B. A sells for 100 and B sells for 90 . The variable production costs are 30 per unit for A and 25 for B. The company's objective could be written as: MAX 190x1 - 55x2.
Indicate whether the statement is true or false

Question 2

A student believes that the average grade on the statistics final examination is 87 . A sample of 36 final examinations is taken. The average grade in the sample is 83.96 . The population variance is 144.
a. State the null and alternative hypotheses.
b. Using a critical value, test the hypothesis at the 5 level of significance.
c. Using a p-value, test the hypothesis at the 5 level of significance.
d. Using a confidence interval, test the hypothesis at the 5 level of significance.
e. Compute the probability of a Type II error if the average grade on the final is 85.

anoriega3 · **Reply #1 on:** Jun 24, 2018

Answer to Question 1

F

Answer to Question 2

a. H0: = 87
Ha: 87
b. Do not reject H0, 1.96 < 1.52 < 1.96 . There is not sufficient evidence at = .05 to conclude that the average statistics final exam grade differs from 87.

c. Do not reject H0, 0.1286 > 0.05 (same conclusion as part b)
d. 80.04 to 87.88; do not reject H0 (same conclusion as part b)
e. .8315