Deck 11: Correlation and Regression

Question 1

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two proportions. The sample sizes are and

Is this a left-tailed test, a right-tailed test, or a two-tailed test?

A) Right-tailed test
B) Two-tailed test
C) Left-tailed test

Answer 1

Right-tailed test

Question 2

A amateur golfer wishes to determine if there is a difference between the drive distances

Answer 2

A

Question 3

The concentration of hexane (a common solvent)was measured in units of micrograms

Answer 3

A

Question 4

A study reported that in a sample of 104 people who watch television news,)

Question 5

The following MINITAB output display presents the results of a hypothesis test for the difference between two population means.

How many degrees of freedom are there for the test statistic?

A) 27
B) 0.029586
C) 28
D) 20.869

Question 6

In an agricultural experiment,)

Question 7

An automobile manufacturer wishes to test that claim that synthetic motor oil can improve gas

Question 8

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two means. The sample sizes are

What is the P -value?

A) 0.142166
B) 1.125505
C) 10.999081
D) 0.857834

Question 9

A test was made of
The sample means were and the sample standard deviations were and the sample sizes were
Is rejected at the 0.05 level? (Hint: First compute the value of the test statistic.)

A) No
B) Yes

Question 10

In a test for the difference between two proportions, the sample sizes were and and the numbers of events were
A test is made of the hypothesis
Can you reject rejected at the level?

A) Yes
B) No

Question 11

A study reported that in a sample of 81 men,)

Question 12

A test was made of The sample means and the sample standard deviations were and the sample sizes
were
Compute the value of the test statistic.

A) -0.697
B) -4.067
C) -7.164
D) -2.899

Question 13

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two proportions. The sample sizes are and

What is the P -value?

A) 0.141377
B) 0.507538
C) 1.074153
D) 0.547368

Question 14

A garden seed wholesaler wishes to test the claim that tomato seeds germinate faster when each

Question 15

The following MINITAB output display presents the results of a hypothesis test for the difference between two population means.

What is the alternate hypothesis?

A)
B)
C)
D)

Question 16

In a test for the difference between two proportions, the sample sizes were and and the numbers of events were
A test is made of the hypothesis
Compute the value of the test statistic.

A) -2.87
B) -2.80
C) -2.93
D) -2.70

Question 17

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two means. The sample sizes are

Can you reject rejected at the level?

A) No
B) Yes

Question 18

The following MINITAB output display presents the results of a hypothesis test for the difference between two population means.

Can you reject rejected at the level?

A) Yes
B) No

Question 19

A test was made of
The sample means were and the sample standard deviations were and the sample sizes were
How many degrees of freedom are there for the test statistic, using the simple method?

A) 12
B) 11
C) 13
D) 10

Question 20

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two means. The sample sizes are

How many degrees of freedom did the calculator use?

A) 20.308612
B) -4.343066
C) 19.308612
D) 0.000158

Question 21

Find the critical value

A) 2.73
B) 3.71
C) 3.36
D) 2.54

Question 22

Following is a sample of five matched pairs. )

Question 23

The bowling scores of a professional bowler during a two-day tournament are shown below.

Question 24

Following is a sample of five matched pairs. )

Question 25

The following MINITAB output display presents the results of a hypothesis test on the difference Is this a left-tailed test, a right-tailed test, or a two tailed test?

A)Two-tailed test
B)Left-tailed test
C)Right-tailed test

Question 26

The football coach at State University wishes to determine if there is a decrease in

Question 27

An F -test with 13 degrees of freedom in the numerator and 9 degrees of freedom in the denominator produced a test statistic whose value was 3.36 . The null and alternate hypotheses were
Do you reject at the level?

A) Yes
B) No

Question 28

The football coach at State University wishes to determine if there is a change in offensive

Question 29

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two proportions. The sample sizes are and

Can you reject rejected at the level?

A) No
B) Yes

Question 30

In an experiment to determine whether there is a systematic difference between the

Question 31

A broth used to manufacture a pharmaceutical product has its sugar content,)

Question 32

The following MINITAB output display presents the results of a hypothesis test on the difference What is the P-value?

A)0.528496
B)0.51412429
C)0.597155
D)0.534091

Question 33

The football coach at State University wishes to determine if there is a decrease in offensive

Question 34

The football coach at State University wishes to determine if there is a decrease in offensive

Question 35

In an experiment to determine whether there is a systematic difference between the weights

Question 36

Five null hypotheses were tested,)

Question 37

The following MINITAB output display presents the results of a hypothesis test on the difference

Question 38

In an experiment to determine whether there is a systematic difference between the weights

Question 39

In an experiment to determine whether there is a systematic difference between the weights