Suppose the critical value for a right-tailed hypothesis test is 2.87 and the test statistic is 3.87, what is the appropriate conclusion?

Reject the null hypothesis

Fail to reject the null hypothesis

Reject the alternative hypothesis

Fail to reject the alternative hypothesis

A tire manufacturer claims that his tires last at least 50,000 miles. A test on 43 tires reveals that mean life of a tire is 49,700 miles with a standard deviation of 2750 miles. You claim that the tires last less than 50,000 miles. Using a significance level of 0.01, calculate the p-value of the test stat -0.715.

0.285

0.239

0.833

0.761

Suppose the p-value for a hypothesis test is 0.063. Using ? = 0.05, what is the appropriate conclusion?

Reject the null hypothesis

Fail to reject the null hypothesis

Reject the alternative hypothesis

Fail to reject the alternative hypothesis

In testing hypotheses, which of the following would be strong evidence for rejecting the null hypothesis?

Using a small level of significance.

Using a large level of significance.

Obtaining data with a small p-value.

Obtaining data with a low test statistic.

A test is made of versus is performed using significance level. The value of the test statistic is z = -2.68 and it is concluded that H₀ is rejected.

If the true value of is 17, what type of error occurred?

Type I error

Type II error

No error occurred. The decision was correct.

There is not enough information to make a conclusion.

Define a type I error.

The failure to reject a false null hypothesis.

The acceptance to reject a null hypothesis.

Rejecting a true null hypothesis.

Accepting a true null hypothesis.

A test is made of versus is performed using a=0.01 significance level. The value of the test statistic is z = -2.68 and it is concluded that H₀ is rejected.

If the true value of is 11, what type of error occurred?

Type I error

Type II error

No error occurred. The decision was correct.

There is not enough information to make a conclusion.

A test is made of versus is performed using a=0.05 significance level. The value of the test statistic is t = -3.14 and it is concluded that we fail to reject H₀.

If the true value of is 65, what type of error occurred?

Type I error

Type II error

No error occurred. The decision was correct.

There is not enough information to make a conclusion.

The weight of an average 4th grade student's backpack is 13.7 lbs. The principal of the school thinks that the backpack does not weigh 13.7 lbs. He takes 35 students' backpacks and weighs them to find that the mean weight is 14.6 lbs with a standard deviation of 1.3 lbs. Calculate the test statistic.

A mayor is concerned about the percentage of city residents who express disapproval of his job performance. His political committee pays for a TV ad. They take a poll of 100 people afterward to test the claim that the TV ad has dropped his disapproval below 32%. If the poll showed that his disapproval decreased to 28%, calculate the test statistic.

The weight of an average 4th grade student's backpack is 13.7 lbs. The principal of the school thinks that the backpack does not weigh 13.7 lbs. Which type of test would this be?

Two-tailed

One-Tailed

Left-Tailed

Right-Tailed

A mayor is concerned about the percentage of city residents who express disapproval of his job performance. His political committee pays for a TV ad. They take a poll afterward to test the claim that the TV ad has dropped his disapproval below 32%. Which of the following represents the appropriate null and alternative hypotheses for this claim?

Suppose the critical value for a right-tailed hypothesis test is 2.87 and the test statistic is 3.87, what is the appropriate conclusion?

Reject the null hypothesis

Fail to reject the null hypothesis

Reject the alternative hypothesis

Fail to reject the alternative hypothesis

A tire manufacturer claims that his tires last at least 50,000 miles. A test on 43 tires reveals that mean life of a tire is 49,700 miles with a standard deviation of 2750 miles. You claim that the tires last less than 50,000 miles. Using a significance level of 0.01, calculate the p-value of the test stat -0.715.

0.285

0.239

0.833

0.761

Suppose the p-value for a hypothesis test is 0.063. Using ? = 0.05, what is the appropriate conclusion?

Reject the null hypothesis

Fail to reject the null hypothesis

Reject the alternative hypothesis

Fail to reject the alternative hypothesis

In testing hypotheses, which of the following would be strong evidence for rejecting the null hypothesis?

Using a small level of significance.

Using a large level of significance.

Obtaining data with a small p-value.

Obtaining data with a low test statistic.

A test is made of versus is performed using significance level. The value of the test statistic is z = -2.68 and it is concluded that H₀ is rejected.

If the true value of is 17, what type of error occurred?

Type I error

Type II error

No error occurred. The decision was correct.

There is not enough information to make a conclusion.

Define a type I error.

The failure to reject a false null hypothesis.

The acceptance to reject a null hypothesis.

Rejecting a true null hypothesis.

Accepting a true null hypothesis.

A test is made of versus is performed using a=0.01 significance level. The value of the test statistic is z = -2.68 and it is concluded that H₀ is rejected.

If the true value of is 11, what type of error occurred?

Type I error

Type II error

No error occurred. The decision was correct.

There is not enough information to make a conclusion.

A test is made of versus is performed using a=0.05 significance level. The value of the test statistic is t = -3.14 and it is concluded that we fail to reject H₀.

If the true value of is 65, what type of error occurred?

Type I error

Type II error

No error occurred. The decision was correct.

There is not enough information to make a conclusion.

The weight of an average 4th grade student's backpack is 13.7 lbs. The principal of the school thinks that the backpack does not weigh 13.7 lbs. He takes 35 students' backpacks and weighs them to find that the mean weight is 14.6 lbs with a standard deviation of 1.3 lbs. Calculate the test statistic.

A mayor is concerned about the percentage of city residents who express disapproval of his job performance. His political committee pays for a TV ad. They take a poll of 100 people afterward to test the claim that the TV ad has dropped his disapproval below 32%. If the poll showed that his disapproval decreased to 28%, calculate the test statistic.

The weight of an average 4th grade student's backpack is 13.7 lbs. The principal of the school thinks that the backpack does not weigh 13.7 lbs. Which type of test would this be?

Two-tailed

One-Tailed

Left-Tailed

Right-Tailed

A mayor is concerned about the percentage of city residents who express disapproval of his job performance. His political committee pays for a TV ad. They take a poll afterward to test the claim that the TV ad has dropped his disapproval below 32%. Which of the following represents the appropriate null and alternative hypotheses for this claim?