EBK STATISTICS FOR BUSINESS & ECONOMICS
12th Edition
ISBN: 9780100460461
Author: Anderson
Publisher: YUZU
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Textbook Question
Chapter 18, Problem 42SE
The following data are product weights for the same items produced on two different production lines. Test for a difference between the product weights for the two lines. Use α = .05.
Line 1 | Line 2 |
13.6 | 13.7 |
13.8 | 14.1 |
14.0 | 14.2 |
13.9 | 14.0 |
13.4 | 14.6 |
13.2 | 13.5 |
13.3 | 14.4 |
13.6 | 14.8 |
12.9 | 14.5 |
14.4 | 14.3 |
15.0 | |
14.9 |
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2.4
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1. Construct a frequency distribution table representing the data using the
following conditions.
a. Start the lowest class interval with the lowest value in the raw data
b. Let the class width be
ual to 0.6
c. Include the following in your frequency table: Class Intervals, Tally,
Frequency, Class Boundaries, Cumulative Frequency Less Than and
Cumulative Frequency Greater Than.
2. Determine the mean, median, mode and standard deviation of this raw
(ungrouped) data set.
III. The Department of Agriculture obtained the following data representing the one
week growth in centimeters of 24 newly planted corn plants.
0.8 1.1
1.3
1.6
1.8 1.8
1.8 2.2
2.4
2.4
2.4
2.4
3.1
3.7 3.9
3.9 3.9
3.9
3.9
4.0 4.1
4.1
4.2
4.9
1. Construct a frequency distribution table representing the data using the
following conditions.
a. Start the lowest class interval with the lowest value in the raw data
b. Let the class width be equal to 0.6
c. Include the following in your frequency table: Class Intervals, Tally,
Frequency, Class Boundaries, Cumulative Frequency Less Than and
Cumulative Frequency Greater Than.
2. Determine the mean, median, mode and standard deviation of this raw
(ungrouped) data set.
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the plant- ing of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours).2.1 2.2 1.7 1.6 2.3 3.1 1.5 2.6 2.4 2.2 With a .05 level of significance, test to see whether the mean tree-planting time differs from two hours. a. State the null and alternative hypotheses. b. Compute the sample mean. c. Compute the sample standard deviation. d. What is the p-value? e. What is your conclusion?
Chapter 18 Solutions
EBK STATISTICS FOR BUSINESS & ECONOMICS
Ch. 18.1 - The following hypothesis test is to be conducted....Ch. 18.1 - Ten individuals participated in a taste test...Ch. 18.1 - The median number of part-time employees at...Ch. 18.1 - Net assets for the 50 largest stock mutual funds...Ch. 18.1 - The median annual income of subscribers to...Ch. 18.1 - The median annual income for families living in...Ch. 18.1 - Prob. 7ECh. 18.1 - A Pew Research Center survey asked adults if their...Ch. 18.1 - A poll taken during the recession in 2008 asked...Ch. 18.1 - Prob. 10E
Ch. 18.1 - Competition in the personal computer market is...Ch. 18.2 - Two fuel additives are tested to determine their...Ch. 18.2 - A sample of 10 men was used in a study to test the...Ch. 18.2 - Percents of on-time arrivals for flights in the...Ch. 18.2 - A test was conducted for two overnight mail...Ch. 18.2 - The PGA Players Championship was held at the...Ch. 18.2 - The Scholastic Aptitude Test (SAT) consists of...Ch. 18.3 - Two fuel additives are being tested to determine...Ch. 18.3 - Samples of starting annual salaries for...Ch. 18.3 - The gap between the earnings of men and women with...Ch. 18.3 - Prob. 21ECh. 18.3 - Each year Bloomberg Businessweek publishes...Ch. 18.3 - Police records show the following numbers of daily...Ch. 18.3 - A certain brand of microwave oven was priced at 10...Ch. 18.3 - Prob. 25ECh. 18.4 - A sample of 15 consumers provided the following...Ch. 18.4 - Three admission test preparation programs are...Ch. 18.4 - Forty-minute workouts of one of the following...Ch. 18.4 - Cond Nast Traveler magazine conducts an annual...Ch. 18.4 - A large corporation sends many of its first-level...Ch. 18.4 - The better-selling candies are often high in...Ch. 18.5 - Consider the following set of rankings for a...Ch. 18.5 - Prob. 33ECh. 18.5 - Prob. 34ECh. 18.5 - A national study by Harris Interactive, Inc.,...Ch. 18.5 - Prob. 36ECh. 18.5 - A student organization surveyed both current...Ch. 18 - A survey asked the following question: Do you...Ch. 18 - Due to a recent decline in the housing market, the...Ch. 18 - Twelve homemakers were asked to estimate the...Ch. 18 - Prob. 41SECh. 18 - The following data are product weights for the...Ch. 18 - A client wants to determine whether there is a...Ch. 18 - Prob. 44SECh. 18 - Prob. 45SECh. 18 - Prob. 46SECh. 18 - Prob. 47SE
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