Essentials of Business Analytics (MindTap Course List)
2nd Edition
ISBN: 9781305627734
Author: Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 11P
The owner of an automobile repair shop studied the waiting times for customers who arrive at the shop for an oil change. The following data with waiting times in minutes were collected over a 1-month period.
2 5 10 12 4 4 5 17 11 8 9 8 12 21 6 8 7 13 18 3
Using classes of 0–4, 5–9, and so on, show:
- a. The frequency distribution.
- b. The relative frequency distribution.
- c. The cumulative frequency distribution.
- d. The cumulative relative frequency distribution.
- e. The proportion of customers needing an oil change who wait 9 minutes or less.
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Claim: Fewer than 95% of adults have a cell phone. In a reputable poll of 1081 adults, 86% said that they have a cell phone. Find the value of the test statistic
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Suppose that in a random selection of 100 colored candies, 22% of them are blue. The candy company claims that the percentage of blue candies is equal to 24%. Use a 0.10 significance level to test that claim.
O A. Ho p=0.24
H₁ p 0.24
OB. Ho p=0.24
H₁ p>0.24
OC. Ho p=0.24
H₁: p<0.24
OD. Ho p# 0.24
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The test statistic for this hypothesis test is
(Round to two decimal places as needed.)
Identify the P-value for this hypothesis test
The P-value for this hypothesis test is ☐
(Round to three decimal places as needed.)
Identify the conclusion for this hypothesis test.
E
OA. Reject Ho. There is not sufficient evidence to warrant rejection of the claim that the percentage of blue candies is equal to 24%
OB. Reject Ho. There is sufficient evidence to warrant rejection of the claim that the percentage of blue candies is equal to 24%
OC. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that the…
Randomly selected birth records were obtained, and categorized as listed in the table to the right. Use a 0.01 significance level to test the reasonable claim that births occur with equal frequency on the different
days of the week. How might the apparent lower frequencies on Saturday and Sunday be explained?
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Ho
H₁
Sun
45
Mon
64
Tues
56
Wed
62
Thurs
59
2
Calculate the test statistic, x²
x²=(Round to three decimal places as needed.)
Calculate the P-value.
P-value = (Round to four decimal places as needed.)
What is the conclusion for this hypothesis test?
OA. Reject Ho. There is insufficient evidence to warrant rejection of the claim that births occur with equal frequency on the different days of the week.
OB. Fail to reject Ho. There is insufficient evidence to warrant rejection of the claim that births occur with equal frequency on the different days of the week.
OC. Reject Ho. There is sufficient evidence to warrant…
Chapter 2 Solutions
Essentials of Business Analytics (MindTap Course List)
Ch. 2 - A Wall Street Journal subscriber survey asked 46...Ch. 2 - The following table contains a partial list of...Ch. 2 - Ohio Logistics manages the logistical activities...Ch. 2 - A partial relative frequency distribution is...Ch. 2 - In a recent report, the top five most-visited...Ch. 2 - In a study of how chief executive officers (CEOs)...Ch. 2 - Consumer complaints are frequently reported to the...Ch. 2 - Reports have found that many U.S. adults would...Ch. 2 - Consider the following data: a. Develop a...Ch. 2 - Consider the following frequency distribution....
Ch. 2 - The owner of an automobile repair shop studied the...Ch. 2 - Approximately 1.65 million high school students...Ch. 2 - Consider a sample with data values of 10, 20, 12,...Ch. 2 - Consider a sample with data values of 27, 25, 20,...Ch. 2 - Consider a sample with data values of 53, 55, 70,...Ch. 2 - If an asset declines in value from 5,000 to 3,500...Ch. 2 - Suppose that you initially invested 10,000 in the...Ch. 2 - The average time that Americans commute to work is...Ch. 2 - Suppose that the average waiting time for a...Ch. 2 - According to the National Education Association...Ch. 2 - Return to the waiting times given for the...Ch. 2 - The results of a national survey showed that on...Ch. 2 - Suppose that the national average for the math...Ch. 2 - Five observations taken for two variables follow....Ch. 2 - The scatter chart in the following figure was...Ch. 2 - The economic downturn in 20082009 resulted in the...Ch. 2 - Heavenly Chocolates manufactures and sells quality...
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