MATH_302_QUIZ_5_1
Part 1 of 3 - 11.0/ 11.0 Points
Question 1 of 20
1.0/ 1.0 Points
Which of the following values is not typically used for f$alpha f$ ?
A.0.05
B.0.10
C.0.01
Correct D.0.50
Answer Key: D
Question 2 of 20
1.0/ 1.0 Points
A severe storm has an average peak wave height of 16.4 feet for waves hitting the
shore. Suppose that a storm is in progress with a severe storm class rating. Let us say
that we want to set up a statistical test to see if the wave action (i.e., height) is dying
down or getting worse. If you wanted to test the hypothesis that the waves are dying
down, what would you use for the alternate hypothesis? Is the P-value area on the left,
right, or on both sides of the mean?
A.H1: \f$\mu \f$ is greater than 16.4 feet; the P-value area is on both sides of the
mean
B.H1: \f$\mu \f$ is not equal to 16.4 feet; the P-value area is on the right of the mean
Correct C.H1: \f$\mu \f$ is less than 16.4 feet; the P-value area is on the left of the
mean
D.H1: \f$\mu \f$ is greater than 16.4 feet; the P-value area is on the left of the mean
Answer Key: C
Question 3 of 20
1.0/ 1.0 Points
You conduct a hypothesis test and you observe values for the sample mean and
sample standard deviation when n = 25 that do not lead to the rejection of H0. You
calculate a p-value of 0.0667. What will happen to the p-value if you observe the same
sample mean and standard deviation for a sample size larger than 25?
A.The p – value stays the same
Correct B.The p – value decreases
C.The p – value may increase or decrease
D.The p – value increases
, Answer Key: B
Question 4 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?
At the a = .01 level of significance, what is your conclusion?
A.
Reject H0. At the \f$\alpha \f$ = .01 level of significance, there is not enough
evidence to support the claim that this technician’s true variance is larger than the target
accuracy.
Correct B.Do not reject H0. At the \f$\alpha \f$ = .01 level of significance there is not
sufficient evidence to suggest that this technician’s true variance is greater than the
target accuracy.
C.Cannot determine
D.Reject H0. At the \f$\alpha \f$ = .01 level of significance, there is enough evidence to
support the claim that this technician’s variance is larger than the target accuracy.
Answer Key: B
Question 5 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.
Correct A.H0: s2 ≤ 1.2, H1: s2 > 1.2
B.H0: s2 ≠ 1.2, H1: s2 = 1.2
C.H0: s2 ≥ 1.2, H1: s2 ≠ 1.2
D.H0: s2 < 1.2, H1: s2 ≠ 1.2
Answer Key: A
Question 6 of 20
1.0/ 1.0 Points
In an article appearing in Today’s Health a writer states that the average number of
Part 1 of 3 - 11.0/ 11.0 Points
Question 1 of 20
1.0/ 1.0 Points
Which of the following values is not typically used for f$alpha f$ ?
A.0.05
B.0.10
C.0.01
Correct D.0.50
Answer Key: D
Question 2 of 20
1.0/ 1.0 Points
A severe storm has an average peak wave height of 16.4 feet for waves hitting the
shore. Suppose that a storm is in progress with a severe storm class rating. Let us say
that we want to set up a statistical test to see if the wave action (i.e., height) is dying
down or getting worse. If you wanted to test the hypothesis that the waves are dying
down, what would you use for the alternate hypothesis? Is the P-value area on the left,
right, or on both sides of the mean?
A.H1: \f$\mu \f$ is greater than 16.4 feet; the P-value area is on both sides of the
mean
B.H1: \f$\mu \f$ is not equal to 16.4 feet; the P-value area is on the right of the mean
Correct C.H1: \f$\mu \f$ is less than 16.4 feet; the P-value area is on the left of the
mean
D.H1: \f$\mu \f$ is greater than 16.4 feet; the P-value area is on the left of the mean
Answer Key: C
Question 3 of 20
1.0/ 1.0 Points
You conduct a hypothesis test and you observe values for the sample mean and
sample standard deviation when n = 25 that do not lead to the rejection of H0. You
calculate a p-value of 0.0667. What will happen to the p-value if you observe the same
sample mean and standard deviation for a sample size larger than 25?
A.The p – value stays the same
Correct B.The p – value decreases
C.The p – value may increase or decrease
D.The p – value increases
, Answer Key: B
Question 4 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?
At the a = .01 level of significance, what is your conclusion?
A.
Reject H0. At the \f$\alpha \f$ = .01 level of significance, there is not enough
evidence to support the claim that this technician’s true variance is larger than the target
accuracy.
Correct B.Do not reject H0. At the \f$\alpha \f$ = .01 level of significance there is not
sufficient evidence to suggest that this technician’s true variance is greater than the
target accuracy.
C.Cannot determine
D.Reject H0. At the \f$\alpha \f$ = .01 level of significance, there is enough evidence to
support the claim that this technician’s variance is larger than the target accuracy.
Answer Key: B
Question 5 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.
Correct A.H0: s2 ≤ 1.2, H1: s2 > 1.2
B.H0: s2 ≠ 1.2, H1: s2 = 1.2
C.H0: s2 ≥ 1.2, H1: s2 ≠ 1.2
D.H0: s2 < 1.2, H1: s2 ≠ 1.2
Answer Key: A
Question 6 of 20
1.0/ 1.0 Points
In an article appearing in Today’s Health a writer states that the average number of
