Question 6 of 20
1.0/ 1.0 Points
The “Pizza Hot” manager commits a Type I error if he/she is
A.staying with old style when new style is no better than old style
B.switching to new style when it is no better than old style
C.staying with old style when new style is better
D.switching to new style when it is better than old style
Answer Key: B

Question 7 of 20
1.0/ 1.0 Points
A type II error occurs when:

Question 8 of 20
1.0/ 1.0 Points
A lab technician is tested for her consistency by taking multiple measurements of
cholesterol levels from the same blood sample. The target accuracy is a variance in
measurements of 1.2 or less. If the lab technician takes 16 measurements and the
variance of the measurements in the sample is 2.2, does this provide enough evidence
to reject the claim that the lab technician’s accuracy is within the target accuracy?
Compute the value of the appropriate test statistic.

Question 9 of 20
1.0/ 1.0 Points
A lab technician is tested for her consistency by taking multiple measurements of
cholesterol levels from the same blood sample. The target accuracy is a variance in
measurements of 1.2 or less. If the lab technician takes 16 measurements and the
variance of the measurements in the sample is 2.2, does this provide enough evidence
to reject the claim that the lab technician’s accuracy is within the target accuracy?
State the null and alternative hypotheses.

C.
H
0
:
≤
1.2, H
1
:
> 1.2
D.
H
0
:
≠ 1.2, H
1
:
= 1.2
Answer Key: C
Question 10 of 20
1.0/ 1.0 Points
A null hypothesis can only be rejected at the 5% significance level if and only if:
A.a 95% confidence interval includes the hypothesized value of the parameter
B.a 95% confidence interval does not include the hypothesized value of the parameter
C.the null hypotheses includes sampling error
D.the null hypothesis is biased
Answer Key: B

Question 11 of 20
1.0/ 1.0 Points
Results from previous studies showed 79% of all high school seniors from a certain city
plan to attend college after graduation. A random sample of 200 high school seniors
from this city reveals that 162 plan to attend college. Does this indicate that the
percentage has increased from that of previous studies? Test at the 5% level of
significance.
What is the p-value associated with your test of hypothesis?

Part 2 of 3 -
3.0/ 6.0 Points