Question

Refer to Case Study 14-2:

a. The obtained value of the appropriate statistic is _________.

A) -3.13
B) 3.14
C) 3.58
D) 3.57
b. The df for determining tcrit equals _________.

A) 8
B) 16
C) 7
D) 14
c. Using α = 0.052 tail, tcrit = _________.

A) +2.365
B) ±2.365
C) ±2.145
D) +2.365
d. Using α = 0.052 tail, what do you conclude?

A) Retain H0; the film has no effect on the frequency of tooth brushing
B) Reject H0; the film affects the frequency of tooth brushing
C) Accept H0; the film has no effect on the frequency of tooth brushing
D) Reject H0; chance alone is a reasonable explanation of the data

Answer 1

The obtained value of the appropriate statistic is 3.14, df for determining tcrit equals 14, tcrit = ±2.365, and the conclusion is 'Reject H0; the film affects the frequency of tooth brushing.'

Step-by-step explanation:

b. The obtained value of the appropriate statistic is 3.14. c. The df for determining tcrit equals 14. c. Using α = 0.052 tail, tcrit = ±2.365. d. Using α = 0.052 tail, the conclusion is Reject H0; the film affects the frequency of tooth brushing.