Question 1

A statement about the value of a population parameter is called a ________________.

Accepted Answer

The answer of A statement about the value of a...

Question 2

A manufacturer claims that less than 1% of all its products do not meet the minimum government standards. A survey of 500 products revealed that 10 did not meet the standard. Thus, the null hypothesis is ___________________.

Accepted Answer

The answer of A manufacturer claims that less than 1%...

Question 3

For a two-tailed test with a 0.05 significance level, where is the rejection region when n is large and the population standard deviation is known?

Accepted Answer

A) Between ±1.960 
B) Between ±1.645 
C) Greater than +1.960 and less than -1.960 
D) Greater than +1.645 and less than -1.645

Question 4

The average cost of tuition and room and board at small private liberal arts colleges is reported to be $8,500 per term, but a financial administrator believes that the average cost is higher. A study conducted using 350 small liberal arts colleges showed that the average cost per term is $8,745. The population standard deviation is $1,200. Let α = 0.05. Based on the computed test statistic or p-value, what is our decision about the average cost?

Accepted Answer

A) Equal to $8,500 
B) Greater than $8,500 
C) Less than $8,500 
D) Not equal to $8,500

Question 5

To conduct a test of hypothesis with a small sample, we make an assumption that __________.

Accepted Answer

A) A larger computed value of t will be needed to reject the null hypothesis 
B) The region of acceptance will be wider than for large samples 
C) The confidence interval will be wider than for large samples 
D) The population is normally distributed

Question 6

A ____________ hypothesis test is indicated if the alternate hypothesis does not specify a direction.

Accepted Answer

The answer of A ____________ hypothesis test is indicated if...

Question 7

A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected?

Accepted Answer

A) To the left of -1.282 or to the right of 1.282 
B) To the left of -1.345 or to the right of 1.345 
C) Between -1.761 and 1.761 
D) To the left of -1.645 or to the right of 1.645

Question 8

A tire manufacturing company is reviewing its warranty for their rainmaker tire. The warranty is for 40,000 miles. The distribution of tire wear is normally distributed with a population standard deviation of 15,000 miles. The tire company believes that the tire actually lasts more than 40,000 miles. A sample of 49 tires revealed that the mean number of miles is 45,000 miles. Test the hypothesis with a 0.05 significance level. What is our decision?

Accepted Answer

The answer of A tire manufacturing company is reviewing its...

Question 9

Which of the following is NOT one of the five steps in the hypothesis testing procedure?

Accepted Answer

A) Formulate a decision rule 
B) State the null and alternate hypotheses 
C) Select a level for β 
D) Identify the test statistic

Question 10

A test statistic for a hypothesis, H₀: µ = 10, computes the standardized difference between the hypothesized population mean and the ______________________.

Accepted Answer

The answer of A test statistic for a hypothesis, H₀:...

Question 11

A manufacturer claims that less than 1% of all its products do not meet the minimum government standards. A survey of 500 products revealed that 10 did not meet the standard. The p-value is ______________.

Accepted Answer

The answer of A manufacturer claims that less than 1%...

Question 12

Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS station. What is your decision if α = 0.01?

Accepted Answer

A) Fail to reject the null hypothesis. 
B) Reject the null hypothesis and conclude the newscast does not reach 41% of the audience. 
C) Fail to reject the alternate and conclude the newscast does not reach 41% of the audience. 
D) Reject the alternate and conclude the newscast reaches about 41% of the audience.

Question 13

What is the probability of making a Type II error if the null hypothesis is actually true?

Accepted Answer

A) α 
B) 1 
C) 0 
D) 0.05

Question 14

An electronics retailer believes that, at most, 40% of their cell phone inventory was sold during November. The retailer surveyed 80 dealers and found that 38% of the inventory was sold. Since 38% is less than 40%, is this difference of 2 percentage points sampling error or a significant difference? Test at the 0.05 level. The computed z = -0.37.

Accepted Answer

A) The 2% is a significant difference. 
B) We cannot determine if the 2% is a significant difference. 
C) There is not enough information to reach a conclusion. 
D) None Apply.

Question 15

When planning an experiment, how is a significance level related to sample size?

Accepted Answer

The answer of When planning an experiment, how is a...

Question 16

It is claimed that in a bushel of peaches, less than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the p-value?

Accepted Answer

A) 0.0250 
B) 0.4525 
C) 0.9525 
D) 0.0500

Question 17

The p-value is determined by the value of a ______________________.

Accepted Answer

The answer of The p-value is determined by the value...

Question 18

Using a 5% level of significance and a sample size of 25, what is the critical t value for a null hypothesis, H0: µµ ≤ 100?

Accepted Answer

A) 1.708 
B) 1.711 
C) 2.060 
D) 2.064

Question 19

The critical t statistic for an alternative hypothesis, H₁: µ > 30, a 1% level of significance, and a sample size of 8 is __________.

Accepted Answer

The answer of The critical t statistic for an alternative...

Question 20

A null hypothesis makes a claim about a __________.

Accepted Answer

A) Population parameter 
B) Sample statistic 
C) Sample mean 
D) Type II error

Exam 10: One-Sample Tests of Hypothesis

A statement about the value of a population parameter is called a ________________.

A manufacturer claims that less than 1% of all its products do not meet the minimum government standards. A survey of 500 products revealed that 10 did not meet the standard. Thus, the null hypothesis is ___________________.

For a two-tailed test with a 0.05 significance level, where is the rejection region when n is large and the population standard deviation is known?

To conduct a test of hypothesis with a small sample, we make an assumption that __________.

A ____________ hypothesis test is indicated if the alternate hypothesis does not specify a direction.

A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected?

Which of the following is NOT one of the five steps in the hypothesis testing procedure?

A test statistic for a hypothesis, H₀: µ = 10, computes the standardized difference between the hypothesized population mean and the ______________________.

A manufacturer claims that less than 1% of all its products do not meet the minimum government standards. A survey of 500 products revealed that 10 did not meet the standard. The p-value is ______________.

Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS station. What is your decision if α = 0.01?

What is the probability of making a Type II error if the null hypothesis is actually true?

When planning an experiment, how is a significance level related to sample size?

It is claimed that in a bushel of peaches, less than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the p-value?

The p-value is determined by the value of a ______________________.

Using a 5% level of significance and a sample size of 25, what is the critical t value for a null hypothesis, H₀: µµ ≤ 100?

The critical t statistic for an alternative hypothesis, H₁: µ > 30, a 1% level of significance, and a sample size of 8 is __________.

A null hypothesis makes a claim about a __________.

Exam 10: One-Sample Tests of Hypothesis

A statement about the value of a population parameter is called a ________________.

A manufacturer claims that less than 1% of all its products do not meet the minimum government standards. A survey of 500 products revealed that 10 did not meet the standard. Thus, the null hypothesis is ___________________.

For a two-tailed test with a 0.05 significance level, where is the rejection region when n is large and the population standard deviation is known?

To conduct a test of hypothesis with a small sample, we make an assumption that __________.

A ____________ hypothesis test is indicated if the alternate hypothesis does not specify a direction.

A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected?

Which of the following is NOT one of the five steps in the hypothesis testing procedure?

A test statistic for a hypothesis, H0: µ = 10, computes the standardized difference between the hypothesized population mean and the ______________________.

A manufacturer claims that less than 1% of all its products do not meet the minimum government standards. A survey of 500 products revealed that 10 did not meet the standard. The p-value is ______________.

Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS station. What is your decision if α = 0.01?

What is the probability of making a Type II error if the null hypothesis is actually true?

When planning an experiment, how is a significance level related to sample size?

It is claimed that in a bushel of peaches, less than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the p-value?

The p-value is determined by the value of a ______________________.

Using a 5% level of significance and a sample size of 25, what is the critical t value for a null hypothesis, H0: µµ ≤ 100?

The critical t statistic for an alternative hypothesis, H1: µ > 30, a 1% level of significance, and a sample size of 8 is __________.

A null hypothesis makes a claim about a __________.

A test statistic for a hypothesis, H₀: µ = 10, computes the standardized difference between the hypothesized population mean and the ______________________.

Using a 5% level of significance and a sample size of 25, what is the critical t value for a null hypothesis, H₀: µµ ≤ 100?

The critical t statistic for an alternative hypothesis, H₁: µ > 30, a 1% level of significance, and a sample size of 8 is __________.