When 100 randomly selected car owners are surveyed, it is found that the mean length of

time they plan to keep their car is 7.01 years, and the standard deviation is 3.74 years.

Calculate the appropriate test statistic to test the claim that the mean for all car owners is less

than 7.5 years.

A. -13.10

B. -2.53

C. -1.31

D. 1.31

E. 2.53

When 100 randomly selected car owners are surveyed, it is found that the mean length of

time they plan to keep their car is 7.01 years, and the standard deviation is 3.74 years.

Calculate the p-value for the test statistic used to test the claim that the mean years for all car

owners is less than 7.5 years.

A. -0.0951

B. 0.0951

C. 0.1902

D. 0.0057

E. - 0.0057

It is estimated that the average person in the US uses 123 gallons of water per day. Some

environmentalists believe this figure is too high and conducted a survey of 40 randomly

selected Americans. They find a mean of 113.03 gallons and a standard deviation of 25.99

gallons. Calculate the appropriate test statistic to test the hypotheses.

A. -0.38

B. 2.43

C. 0.38

D. -15.34

E. -2.43

A recent study conducted by the state government attempts to determine whether the

voting public supports further increase in cigarette taxes. The opinion poll recently sampled

1500 voting age citizens. 1020 of the sampled citizens were in favor of an increase in cigarette

taxes. The state government would like to decide if there is enough evidence to establish

whether the proportion of citizens supporting an increase in cigarette taxes is significantly

greater than .66. What is the sample value of the test statistic?

A. 1.348

B. 1.661

C. 3.452

D. 1.635

A recent study conducted by the state government attempts to determine whether the

voting public supports further increase in cigarette taxes. The opinion poll recently sampled

1500 voting age citizens. 1020 of the sampled citizens were in favor of an increase in cigarette

taxes. The state government would like to decide if there is enough evidence to establish

whether the proportion of citizens supporting an increase in cigarette taxes is significantly

greater than .66. What is the p-value for this test?

A. 0511

B. 1022

C. 0548

D. 0446

A recent study conducted by the state government attempts to determine whether the

voting public supports further increase in cigarette taxes. The opinion poll recently sampled

1500 voting age citizens. 1020 of the sampled citizens were in favor of an increase in cigarette

taxes. The state government would like to decide if there is enough evidence to establish

whether the proportion of citizens supporting an increase in cigarette taxes is significantly

greater than .66. The alternative hypothesis is:

A. p < .66

B. p > .66

C. p = .66

D. p .66

A recent study conducted by the state government attempts to determine whether the

voting public supports further increase in cigarette taxes. The opinion poll recently sampled

1500 voting age citizens. 1020 of the sampled citizens were in favor of an increase in cigarette

taxes. The state government would like to decide if there is enough evidence to establish

whether the proportion of citizens supporting an increase in cigarette taxes is significantly

greater than .66. What is the critical value (given in terms of the value of the test statistic) at a

= .10?

A. 1.282

B. 1.645

C. 1.960

D. 2.326

Based on a random sample of 25 units of product X, the average weight is 102 lbs., and

the sample standard deviation is 10 lbs. We would like to decide if there is enough evidence

to establish that the average weight for the population of product X is greater than 100 lbs.

Assume the population is normally distributed. What is the critical value (given in terms of

the value of the test statistic) at a = .05?

A. 1.645

B. 1.711

C. 1.708

D. 2.064

Two hospital emergency rooms use different procedures for triage of their patients. We

want to test the claim that the mean waiting time of patients is the same for both hospitals.

The 40 randomly selected subjects from one hospital produce a mean of 18.3 minutes. The 50

randomly selected patients from the other hospital produce a mean of 25.31 minutes. Assume

a sa = 2.1 minutes and sb = 2.92 minutes. Calculate the test statistic for testing these

hypothesis.

A. -21.05

B. -24.97

C. -13.24

D. -18.49

In an opinion survey, a random sample of 1000 adults from the U.S.A and 1000 adults

from Germany were asked whether they supported the death penalty. 590 American adults

and 560 German adults indicated that they supported the death penalty. The researcher wants

to know if there is sufficient evidence to conclude that the proportion of adults who support

the death penalty is higher in the U.S.A. than in Germany. What is the p-value for this test?

A. 0.003

B. 0.1738

C. 0.0869

D. 0.0274

In an opinion survey, a random sample of 1000 adults from the U.S.A and 1000 adults

from Germany were asked whether they supported the death penalty. 590 American adults

and 560 German adults indicated that they supported the death penalty. The researcher wants

to know if there is sufficient evidence to conclude that the proportion of adults who support

the death penalty is higher in the U.S.A. than in Germany. What is the rejection point (critical

value of the test statistic) at = .05?

A. 1.96

B. 2.33

C. 1.28

D. 1.645

In an opinion survey, a random sample of 1000 adults from the U.S.A and 1000 adults

from Germany were asked whether they supported the death penalty. 590 American adults

and 560 German adults indicated that they supported the death penalty. The researcher wants

to know if there is sufficient evidence to conclude that the proportion of adults who support

the death penalty is higher in the U.S.A. than in Germany. What is the sample value of the test

statistic?

A. 0.607

B. 1.358

C. 2.745

D. 1.919

In an opinion survey, a random sample of 1000 adults from the U.S.A and 1000 adults

from Germany were asked whether they supported the death penalty. 590 American adults

and 560 German adults indicated that they supported the death penalty. The researcher wants

to know if there is sufficient evidence to conclude that the proportion of adults who support

the death penalty is higher in the U.S.A. than in Germany. What is the rejection point (critical

value of the test statistic) at = .10?

A. 1.96

B. 2.33

C. 1.28

D. 1.645