Question

 

1. An electronics company wants to compare the quality of their cell phones to the cell phones from three competitors. They sample 10 phones from each company and count the number of defects for each phone. If ANOVA was used to compare the average number of defects, then the treatments would be defined as:

Select one:

a. The three companies

b. The total number of phones

c. The number of cell phones sampled

d. The average number of defects

2. A grocery store chain wants to compare the amount of withdrawals that its customers make from automatic teller machines (ATMs) located within their stores. They sample 3 withdrawals from each of four different locations (12 withdrawals total) to compare the four treatment means. What is the critical value between the accept and reject regions if the level of significance is 0.05?

Select one:

a. 8.81

b. 9.55

c. 3.86

d. 19.16

e. 4.07

Answer 1

1)

a. The three companies

2)

degree of freedom for numerator =k(treatments) -1=4-1=3

degree of freedom for Denominator =N-k=12-4 =8

from excel: critical value =Finv(0.05,3,8)= 4.07