Basic Business Statistics, Student Value Edition (13th Edition)
13th Edition
ISBN: 9780321946393
Author: Mark L. Berenson, David M. Levine, Kathryn A. Szabat
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 9PS
In the U.S. legal system, a defendant is presumed innocent until proven guilty. Consider a null hypothesis,
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When a new drug is created, the pharmaceutical company must subject it to testing before receiving the necessary permission from the Food and Drug Administration (FDA) to market the drug. Suppose the null hypothesis is "the drug is unsafe." What is the Type II Error?
a- The Type II Error would be to claim the drug is unsafe when, in fact, it is unsafe.
b- The Type II Error would be to claim the drug is unsafe when, in fact, it is safe.
c- The Type II Error would be to claim the drug is safe when, in fact, it is safe.
d- The Type II Error would be to claim the drug is safe when, in fact, it is unsafe.
he mayor must make a decision whether or not to cancel school because of a threatening Habagat. What would the results be of Type I and Type II errors for the null hypothesis: The weather will remain dry?
a.Type I error: weather remains dry, but school is needlessly canceled.
Type II error: don’t cancel school, but Habagat will bring heavy rain.
b.Type I error: don’t cancel school, but Habagat will bring heavy rain.
Type II error: weather remains dry, but school is needlessly canceled.
c.Type I error: cancel school, and Habagat will bring heavy rain.
Type II error: don’t cancel school, and weather remains dry.
d.Type I error: don’t cancel school, but Habagat will bring heavy rain.
Type II error: cancel school, and the s Habagat will bring heavy rain.
e.Type I error: don’t cancel school, and Habagat will bring heavy rain.
Type II error: don’t cancel school, and weather remains dry
A psychologist is conducting a study to determine whether a new therapy is safe and effective at treating PTSD. If the null hypothesis is Ho: the new therapy is safe and effective, and the alternative hypothesis is H₁: the new therapy is not safe and effective, state the Type I and Type II errors.
Chapter 9 Solutions
Basic Business Statistics, Student Value Edition (13th Edition)
Ch. 9 - If you use a 0.005 level of significance in a...Ch. 9 - If you use a 0.05 level of significance in a...Ch. 9 - If you use a 0.10 level of significance in a...Ch. 9 - If you use a 0.01 level of significance in a...Ch. 9 - What is your decision in problem 9.4 if...Ch. 9 - What is the p -value if, in a two-tail hypothesis...Ch. 9 - In problem 9.6, what is your statistical decision...Ch. 9 - What is the p-value if, in a two -tail hypothesis...Ch. 9 - In the U.S. legal system, a defendant is presumed...Ch. 9 - Suppose the defendant in Problem 9.9 is presumed...
Ch. 9 - Many consumer groups feel that U.S. Food and Drug...Ch. 9 - As a result of complaints from both students and...Ch. 9 - Prob. 13PSCh. 9 - The quality-control manager at a compact...Ch. 9 - Suppose that in Problem 9.14, the standard...Ch. 9 - A bottled water distributor wants to determine...Ch. 9 - Suppose that in Problem 9.16, the standard...Ch. 9 - If, In a sample of n=16 selected from a normal...Ch. 9 - In Problem 9.18, how many degrees of freedom does...Ch. 9 - In Problem 9.18, 9.19, what are the Critical...Ch. 9 - In, Problem 9.18, 9.19, and 9.20, what is your...Ch. 9 - If, in a sample of n=16 selected from a...Ch. 9 - If, in a sample of n=160 selected from a...Ch. 9 - You are the manager of a restaurant for a...Ch. 9 - A manufacturer of chocolate candies uses machines...Ch. 9 - Prob. 26PSCh. 9 - The U.S. Department of Transportation requires...Ch. 9 - The file FastFood contains the amount that a...Ch. 9 - An insurance company has the business objective of...Ch. 9 - The following data (in Drink) represent the amount...Ch. 9 - One of the major measures of the quality of...Ch. 9 - A manufacturing company produces steel housings...Ch. 9 - One operation of a steel mill is to cut pieces of...Ch. 9 - In Problem 3.69 on page 156, you were introduced...Ch. 9 - Prob. 35PSCh. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.36, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.38, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.40, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.42, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.44, what is your statistical decision...Ch. 9 - Prob. 46PSCh. 9 - Prob. 47PSCh. 9 - Prob. 48PSCh. 9 - You are the manager of a restaurant that delivers...Ch. 9 - A survey of nonprofit organizations showed that...Ch. 9 - Prob. 51PSCh. 9 - If, a random sample of 400 items, 88 are...Ch. 9 - In Problem 9.52, if the null hypothesis is that 20...Ch. 9 - In Problem 9.52 and 9.53, suppose you are testing...Ch. 9 - Prob. 55PSCh. 9 - The worldwide market share for the Mozilla Firefox...Ch. 9 - One of the issues facing organizations Is...Ch. 9 - Prob. 58PSCh. 9 - A cellphone provider has the business objective of...Ch. 9 - Prob. 60PSCh. 9 - What is the difference between a null hypothesis,...Ch. 9 - What is the difference between a Type I error and...Ch. 9 - What is meant by the power of a test?Ch. 9 - What is the difference between a one -tail test...Ch. 9 - What is meant by a p-value?Ch. 9 - How can a confidence interval estimate for the...Ch. 9 - What is the six-step critical value approach to...Ch. 9 - What is the five-step p-value approach to...Ch. 9 - In hypothesis testing, the common level of...Ch. 9 - Financial institutions utilize prediction models...Ch. 9 - Prob. 71PSCh. 9 - The owner of a speciality coffee shop wants to...Ch. 9 - An auditor for a government agency was assigned...Ch. 9 - A bank branch located in a commercial district of...Ch. 9 - Call centers today play an important role in...Ch. 9 - An important quality characteristic used by the...Ch. 9 - Studies conducted by the manufacturer of Boston...Ch. 9 - The manufacturer of Boston and Vermont asphalt...Ch. 9 - Referring to the results of problems 9.76 through...
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- If two fair dices are rolled, find the probabilities of the following results. A sum of 6, given that the roll was a double two identical numbersarrow_forwardIn the Country A legal system, a defendant is presumed innocent until proven guilty. Consider a null hypothesis, Ho, that the defendant is innocent, and an alternative hypothesis, H,, that the defendant is guilty. A jury has two possible decisions: Convict the defendant (i.e., reject the null hypothesis) or do not c defendant (i.e., do not reject the null hypothesis). Explain the meaning of the risks of committing either a Type I or Type Il error in this example. ..... Choose the correct answer below. O A. AType l error would be incorrectly failing to convict the defendant when he is innocent. A Type Il error would be incorrectly convicting the defendant when he is guilty. O B. A Type l error would be incorrectly failing to convict the defendant when he is guilty. A Type Il error would be incorrectly convicting the defendant when he is innocent. O C. AType I error would be incorrectly convicting the defendant when he is innocent. A Type Il error would be incorrectly failing to convict…arrow_forwardIn the Country A legal system, a defendant is presumed innocent until proven guilty. Consider a null hypothesis, Ho, that the defendant is innocent, and an alternative hypothesis, H,, that the defendant is guilty. A jury has two possible decisions: Convict the defendant (i.e., reject the null hypothesis) or do not convict the defendant (i.e., do not reject the null hypothesis). Explain the meaning of the risks of committing either a Type I or Type Il error in this example. Choose the correct answer below. O A. A Type I error would be incorrectly failing to convict the defendant when he is innocent. A Type Il error would be incorrectly convicting the defendant when he is guilty. B. A Type I error would be incorrectly convicting the defendant when he is innocent. A Type Il error would be incorrectly failing to convict the defendant when he is guilty. C. A Type I error would be incorrectly failing to convict the defendant when he is guilty. A Type Il error would be incorrectly convicting…arrow_forward
- In hypothesis testing if the null hypothesis is rejected, a. no conclusions can be drawn from the test b. the alternative hypothesis must also be rejected c. the data must have been collected incorrectly d. the evidence supports the alternative hypothesisarrow_forwardCan you state the null hypothesis H0 and the alternative hypothesis H1? .arrow_forwardWhenever the null hypothesis is not rejected, the alternative hypothesis a. is also not rejected. b. is rejected. c. must be revised. d. replaces the null hypothesis.arrow_forward
- If your claim is in the alternative hypothesis and you fail to reject the null hypothesis, then your conclusion would be:arrow_forwardWhen a new drug is created, the pharmaceutical company must subject it to testing before receiving permission from the FDA to market the drug. Supposed the null hypothesis is "the drug is unsafe". What is a Type I error in this scenario? Group of answer choices Not to conclude the drug is unsafe. To conclude the drug is safe. To conclude the drug is safe when in fact it is unsafe. Not to conclude the drug is safe when in fact it is safearrow_forwardIf you fail to reject the null hypothesis when it is, in fact, false; what type of error is this called? If you retain the null hypothesis when it is, in fact, true; have you made an error? If so, which one? If you reject the null hypothesis, when it is, in fact, true, what type of error have you committed?arrow_forward
- A group of doctors is deciding whether or not to perform an operation. Suppose the null hypothesis, H0, is: the surgical procedure will go well. Which is the error with the greater consequence?arrow_forwardThe alternative hypothesis, denoted by H1, represents the opposite of the null hypothesis and is believed to be true if the null hypothesis is found to be false. Select one: True O Falsearrow_forwardA researcher conducts a research study to examine whether there is a difference between two treatments regarding anxiety. Which of the following is consistent conceptually with the null hypothesis? a. The second treatment is less effective than the first treatment regarding anxiety. b. The first treatment is less effective than the second treatment regarding anxiety. c. There is a difference between the two treatments among the general population regarding anxiety. d. There is no difference between the two treatments among the general population regarding anxiety.arrow_forward
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