Question 1

More evidence against H0 is indicated by

Accepted Answer

A) lower levels of significance 
B) smaller p-values 
C) smaller critical values 
D) lower probabilities of a Type II error 
A) lower levels of significance 
B) smaller p-values 
C) smaller critical values 
D) lower probabilities of a Type II error B

Question 2

When using Excel to calculate a p-value for an upper-tail hypothesis test, the following must be used

Accepted Answer

A) RAND 
B) 1 F1F1F1S1F1F1F10 NORM.S.DIST 
C) NORM.S.DIST 
D) Not enough information is given to answer this question. 
A) RAND 
B) 1 F1F1F1S1F1F1F10 NORM.S.DIST 
C) NORM.S.DIST 
D) Not enough information is given to answer this question. B

Question 3

Bastien, Inc. has been manufacturing small automobiles that have averaged 50 miles per gallon of gasoline in highway driving. The company has developed a more efficient engine for its small cars and now advertises that its new small cars average more than 50 miles per gallon in highway driving. An independent testing service road-tested 36 of the automobiles. The sample showed an average of 51.5 miles per gallon. The population standard deviation is 6 miles per gallon.
a.With a 0.05 level of significance, test to determine whether or not the manufacturer's advertising campaign is legitimate.
b.What is the p-value associated with the sample results?

Accepted Answer

a.H₀: F1F1F1S1F1F1F10 F1F1F1S1F1F1F10 50 H_a: F1F1F1S1F1F1F10 F1F1F1S1F1F1F10 50 z F1F1F1S1F1F1F10 1.5, therefore, do not reject H_0,there is not sufficient evidence at F1F1F1S1F1F1F10 F1F1F1S1F1F1F10 .05 to conclude that the new cars average more than 50 miles per gallon. b.0.0668

Question 4

In tests about a population proportion, p0 represents the

Accepted Answer

A) hypothesized population proportion 
B) observed sample proportion 
C) observed p-value 
D) probability of 
A) hypothesized population proportion 
B) observed sample proportion 
C) observed p-value 
D) probability of

Question 5

In hypothesis testing, the critical value is

Accepted Answer

A) a number that establishes the boundary of the rejection region 
B) the probability of a Type I error 
C) the probability of a Type II error 
D) the same as the p-value 
A) a number that establishes the boundary of the rejection region 
B) the probability of a Type I error 
C) the probability of a Type II error 
D) the same as the p-value

Question 6

A Type I error is committed when

Accepted Answer

A) a true alternative hypothesis is not accepted 
B) a true null hypothesis is rejected 
C) the critical value is greater than the value of the test statistic 
D) sample data contradict the null hypothesis 
A) a true alternative hypothesis is not accepted 
B) a true null hypothesis is rejected 
C) the critical value is greater than the value of the test statistic 
D) sample data contradict the null hypothesis

Question 7

When using Excel to calculate a p-value for a lower-tail hypothesis test, the following must be used

Accepted Answer

A) RAND 
B) 1 F1F1F1S1F1F1F10 NORM.S.DIST 
C) NORM.S.DIST 
D) Not enough information is given to answer this question. 
A) RAND 
B) 1 F1F1F1S1F1F1F10 NORM.S.DIST 
C) NORM.S.DIST 
D) Not enough information is given to answer this question.

Question 8

The rejection region for a one-tailed hypothesis test

Accepted Answer

A) has an area of 1 - F1F1F1S1F1F1F10 
B) has an area equal to the confidence coefficient 
C) is in the tail that supports the null hypothesis 
D) is in the tail that supports the alternative hypothesis 
A) has an area of 1 - F1F1F1S1F1F1F10 
B) has an area equal to the confidence coefficient 
C) is in the tail that supports the null hypothesis 
D) is in the tail that supports the alternative hypothesis

Question 9

An example of statistical inference is

Accepted Answer

A) a population mean 
B) descriptive statistics 
C) calculating the size of a sample 
D) hypothesis testing 
A) a population mean 
B) descriptive statistics 
C) calculating the size of a sample 
D) hypothesis testing

Question 10

The level of significance in hypothesis testing is the probability of

Accepted Answer

A) accepting a true null hypothesis 
B) accepting a false null hypothesis 
C) rejecting a true null hypothesis 
D) could be any of the above, depending on the situation 
A) accepting a true null hypothesis 
B) accepting a false null hypothesis 
C) rejecting a true null hypothesis 
D) could be any of the above, depending on the situation

Question 11

A soft drink filling machine, when in perfect adjustment, fills the bottles with 12 ounces of soft drink. A random sample of 25 bottles is selected, and the contents are measured. The sample yielded a mean content of 11.88 ounces, with a standard deviation of 0.24 ounces. With a 0.05 level of significance, test to see if the machine is in perfect adjustment. Assume the distribution of the population is normal.

Accepted Answer

H₀: F1F1F1S1F1F1F10 F1F1F1S1F1F1F10 12

Question 12

If a hypothesis is not rejected at a 5% level of significance, it will

Accepted Answer

A) also not be rejected at the 1% level 
B) always be rejected at the 1% level 
C) sometimes be rejected at the 1% level 
D) Not enough information is given to answer this question. 
A) also not be rejected at the 1% level 
B) always be rejected at the 1% level 
C) sometimes be rejected at the 1% level 
D) Not enough information is given to answer this question.

Question 13

Exhibit 9-1
  
-Refer to Exhibit 9-1. The p-value is

Accepted Answer

A) 0.5107 
B) 0.0214 
C) 0.0107 
D) 2.1 
A) 0.5107 
B) 0.0214 
C) 0.0107 
D) 2.1

Question 14

A new soft drink is being market tested. A sample of 400 individuals participated in the taste test and 80 indicated they like the taste.
a.At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.
b.Determine the p-value.

Accepted Answer

a.H₀: p F1F1F1S1F1F1F10 0.22 H_a: p F1F1F1

Question 15

Excel's __________ function can be used to calculate a p-value for a hypothesis test when F1F1F1S1F1F1F10 is unknown.

Accepted Answer

A) RAND 
B) T.DIST 
C) NORM.S.DIST 
D) Not enough information is given to answer this question. 
A) RAND 
B) T.DIST 
C) NORM.S.DIST 
D) Not enough information is given to answer this question.

Question 16

Exhibit 9-4
A random sample of 16 students selected from the student body of a large university had an average age of 25 years. We want to determine if the average age of all the students at the university is significantly different from 24. Assume the distribution of the population of ages is normal with a standard deviation of 2 years.
-Refer to Exhibit 9-4. At a .05 level of significance, it can be concluded that the mean age is

Accepted Answer

A) not significantly different from 24 
B) significantly different from 24 
C) significantly less than 24 
D) significantly less than 25 
A) not significantly different from 24 
B) significantly different from 24 
C) significantly less than 24 
D) significantly less than 25

Question 17

A Type II error is committed when

Accepted Answer

A) a true alternative hypothesis is mistakenly rejected 
B) a true null hypothesis is mistakenly rejected 
C) the sample size has been too small 
D) not enough information has been available 
A) a true alternative hypothesis is mistakenly rejected 
B) a true null hypothesis is mistakenly rejected 
C) the sample size has been too small 
D) not enough information has been available

Question 18

A two-tailed test is a

Accepted Answer

A) hypothesis test in which rejection region is in both tails of the sampling distribution 
B) hypothesis test in which rejection region is in one tail of the sampling distribution 
C) hypothesis test in which rejection region is only in the lower tail of the sampling distribution 
D) hypothesis test in which rejection region is only in the upper tail of the sampling distribution 
A) hypothesis test in which rejection region is in both tails of the sampling distribution 
B) hypothesis test in which rejection region is in one tail of the sampling distribution 
C) hypothesis test in which rejection region is only in the lower tail of the sampling distribution 
D) hypothesis test in which rejection region is only in the upper tail of the sampling distribution

Question 19

A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days. The population standard deviation is 5.6 days.
a.State the null and alternative hypotheses.
b.Using a critical value, test the null hypothesis at the 5% level of significance.
c.Using a p-value, test the hypothesis at the 5% level of significance.
d.Compute the probability of a Type II error if the true average delivery time is 17 days after purchase.

Accepted Answer

a.H₀: F1F1F1S1F1F1F10 F1F1F1S1

Question 20

The school's newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper's claim. The correct set of hypotheses is

Accepted Answer

A) H0: p a: p F1F1F1S1F1F1F10 0.30 
B) H0: p F1F1F1S1F1F1F10 0.30 Ha: p > 0.30 
C) H0: p F1F1F1S1F1F1F10 0.30 Ha: p 0: p > 0.30 Ha: p F1F1F1S1F1F1F10 0.30 
A) H0: p a: p F1F1F1S1F1F1F10 0.30 
B) H0: p F1F1F1S1F1F1F10 0.30 Ha: p > 0.30 
C) H0: p F1F1F1S1F1F1F10 0.30 Ha: p 0: p > 0.30 Ha: p F1F1F1S1F1F1F10 0.30

More evidence against H₀ is indicated by

When using Excel to calculate a p-value for an upper-tail hypothesis test, the following must be used

In tests about a population proportion, p₀ represents the

In hypothesis testing, the critical value is

A Type I error is committed when

When using Excel to calculate a p-value for a lower-tail hypothesis test, the following must be used

The rejection region for a one-tailed hypothesis test

An example of statistical inference is

The level of significance in hypothesis testing is the probability of

If a hypothesis is not rejected at a 5% level of significance, it will

Exhibit 9-1 -Refer to Exhibit 9-1. The p-value is

A new soft drink is being market tested. A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. a.At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink. b.Determine the p-value.

Excel's __________ function can be used to calculate a p-value for a hypothesis test when  is unknown.

A Type II error is committed when

A two-tailed test is a

The school's newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper's claim. The correct set of hypotheses is

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Statistical Methods for Quality Control

Time Series Analysis and Forecastng

Filters

Exam 9: Hypothesis Tests

More evidence against H0 is indicated by

When using Excel to calculate a p-value for an upper-tail hypothesis test, the following must be used

In tests about a population proportion, p0 represents the

In hypothesis testing, the critical value is

A Type I error is committed when

When using Excel to calculate a p-value for a lower-tail hypothesis test, the following must be used

The rejection region for a one-tailed hypothesis test

An example of statistical inference is

The level of significance in hypothesis testing is the probability of

If a hypothesis is not rejected at a 5% level of significance, it will

Exhibit 9-1 -Refer to Exhibit 9-1. The p-value is

A new soft drink is being market tested. A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. a.At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink. b.Determine the p-value.

Excel's __________ function can be used to calculate a p-value for a hypothesis test when  is unknown.

A Type II error is committed when

A two-tailed test is a

The school's newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper's claim. The correct set of hypotheses is

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Statistical Methods for Quality Control

Time Series Analysis and Forecastng

Filters

More evidence against H₀ is indicated by

In tests about a population proportion, p₀ represents the