1)

Exhibit 9-31

n=64

H₀:=60,

X bar=64.8

H_a:60

=24

Refer to Exhibit 9-31. Thep-value is equal to _____.

Question 1 options:

.2698

.0548

.2302

.1096

Question 2

In stats we can either use a critical value or ap-value approach for hypothesis testing. If thep-value approach our decision rule is to reject the null hypothesis if_____.

Question 2 options:

p-value>

p-value=z

p-value is 1

p-value

Question 3

A sample of 80 observations will be taken from a process (an infinite population). The population proportion equals .16. The probability that the sample proportion will be less than .1768 is _____.

Question 3 options:

.9222

.0778

.3409

.6591

Question 4

A population has a mean of 180 and a standard deviation of 36. A sample of 81 observations will be taken. The probability that the mean from that sample will be between 182 and 178 is _____.

Question 4 options:

0.1359

0.3829

0.8185

0.0228

Question 5

Exhibit 8-12

In order to estimate the average time spent on an exam at a local university, data were collected from a sample of 36 business students over a one-week period. Assume the population standard deviation is 6 hours.

Refer to Exhibit 8-12. With a .95 probability, the margin of error is approximately_____.

Question 5 options:

1.96

1.64

.26

.21

Question 6

If we want to provide a 95% confidence interval for the mean of a population, the Z value is:

1.645

1.96

.485

.95