Mind on Statistics
5th Edition
ISBN: 9781285463186
Author: Jessica M. Utts, Robert F. Heckard
Publisher: Brooks Cole
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Textbook Question
Chapter 2, Problem 2.65E
The weights (in pounds) for nine men on the Cambridge crew team were as follows (The Independent, March 31, 1992; also Hand et al., 1994, p. 337):
188.5, 183.0, 194.5, 185.0, 214.0, 203.5, 186.0, 178.5, 109.0
The nine men are comprised of eight rowers and a coxswain, a person who does not row but gives orders to the rowers about the rowing tempo.
- Find a five-number summary for these data.
- Identify whether or not any data points would qualify to be marked as an outlier on a boxplot. If there are outliers, specify the values.
- Which individual do you think is the coxswain?
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STATE: How heavy a load (in pounds) is needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Given are data from students doing a laboratory exercise.
33,190
31,860
32,590
26,520
33,280
32,320
33,020
32,030
30,460
32,700
23,040
30,930
32,720
33,650
32,340
24,050
30,170
31,300
28,730
31,920
We are willing to regard the wood pieces prepared for the lab session as an SRS of all similar pieces of Douglas fir. Engineers also commonly assume that characteristics of materials vary Normally. Suppose that the strength of pieces of wood like these follows a Normal distribution with standard deviation 3000 pounds.
PLAN: We will estimate ? by giving a 98% confidence interval.
SOLVE: Find the sample mean ?¯ . (Enter your answer rounded to the nearest whole number.)
?¯=
Give a 98% confidence interval, [???,ℎ??ℎ] , for the mean load required to pull the wood apart. (Enter your answers rounded to the nearest whole number.)
???=…
Chapter 2 Solutions
Mind on Statistics
Ch. 2 - A sociologist assembles a dataset consisting of...Ch. 2 - Suppose that in a national survey of 620 randomly...Ch. 2 - In each situation, explain whether it would be...Ch. 2 - In each situation, explain whether it would be...Ch. 2 - For each of the following statistical summaries,...Ch. 2 - Prob. 2.6ECh. 2 - Prob. 2.7ECh. 2 - Read Case Study 1.5 (p. 4) about prayer and blood...Ch. 2 - Prob. 2.9ECh. 2 - Read Case Study 1.6 (p.5) about aspirin and heart...
Ch. 2 - Prob. 2.11ECh. 2 - For each of the following characteristics of an...Ch. 2 - Prob. 2.13ECh. 2 - Prob. 2.14ECh. 2 - Prob. 2.15ECh. 2 - Prob. 2.16ECh. 2 - Prob. 2.17ECh. 2 - For each pair of variables, specify which variable...Ch. 2 - Prob. 2.19ECh. 2 - Prob. 2.20ECh. 2 - Prob. 2.21ECh. 2 - Prob. 2.22ECh. 2 - Prob. 2.23ECh. 2 - Prob. 2.24ECh. 2 - Prob. 2.25ECh. 2 - Prob. 2.26ECh. 2 - Table 2.1 (P. 20) summarized frequency of seatbelt...Ch. 2 - Prob. 2.28ECh. 2 - Prob. 2.29ECh. 2 - Refer to Exercise 2.27. Students also were asked...Ch. 2 - Prob. 2.31ECh. 2 - Prob. 2.32ECh. 2 - Prob. 2.33ECh. 2 - Prob. 2.34ECh. 2 - Prob. 2.35ECh. 2 - Prob. 2.36ECh. 2 - This is the same as Exercise ¡.1. The five-number...Ch. 2 - Prob. 2.38ECh. 2 - Prob. 2.39ECh. 2 - Prob. 2.40ECh. 2 - Prob. 2.41ECh. 2 - Prob. 2.42ECh. 2 - Prob. 2.43ECh. 2 - Hand et al. (1994, p. 148) provide data on the...Ch. 2 - The following stem-and-leaf plot is for the mean...Ch. 2 - Prob. 2.46ECh. 2 - Prob. 2.47ECh. 2 - Prob. 2.48ECh. 2 - Prob. 2.49ECh. 2 - Prob. 2.50ECh. 2 - Prob. 2.51ECh. 2 - Prob. 2.52ECh. 2 - Prob. 2.53ECh. 2 - Prob. 2.54ECh. 2 - Prob. 2.55ECh. 2 - Prob. 2.56ECh. 2 - Prob. 2.57ECh. 2 - Prob. 2.58ECh. 2 - Prob. 2.59ECh. 2 - Prob. 2.60ECh. 2 - Prob. 2.61ECh. 2 - Students in a statistics class wrote as many...Ch. 2 - Prob. 2.63ECh. 2 - The following cholesterol levels for n = 20...Ch. 2 - The weights (in pounds) for nine men on the...Ch. 2 - A set of eight systolic blood pressures follows:...Ch. 2 - Prob. 2.67ECh. 2 - Prob. 2.68ECh. 2 - Prob. 2.69ECh. 2 - Prob. 2.70ECh. 2 - Prob. 2.71ECh. 2 - Prob. 2.72ECh. 2 - Prob. 2.73ECh. 2 - The football team at the school of one of the...Ch. 2 - Prob. 2.75ECh. 2 - Prob. 2.76ECh. 2 - Prob. 2.77ECh. 2 - Prob. 2.78ECh. 2 - Prob. 2.79ECh. 2 - Prob. 2.80ECh. 2 - Prob. 2.81ECh. 2 - Prob. 2.82ECh. 2 - Prob. 2.83ECh. 2 - Prob. 2.84ECh. 2 - Prob. 2.85ECh. 2 - Prob. 2.86ECh. 2 - Prob. 2.87ECh. 2 - Suppose that the distribution of speeds at an...Ch. 2 - Prob. 2.89ECh. 2 - Prob. 2.90ECh. 2 - Prob. 2.91ECh. 2 - Prob. 2.92ECh. 2 - Prob. 2.93ECh. 2 - The data for Exercise 2.66 was this set of...Ch. 2 - Prob. 2.95ECh. 2 - If you learn that your score on an exam was 80 and...Ch. 2 - The scores on the final exam in a course with a...Ch. 2 - Prob. 2.98ECh. 2 - Prob. 2.99ECh. 2 - Prob. 2.100ECh. 2 - Head circumferences of adult males have a...Ch. 2 - Prob. 2.102ECh. 2 - Suppose verbal SAT scores for students admitted to...Ch. 2 - Prob. 2.104ECh. 2 - Prob. 2.105ECh. 2 - Prob. 2.106ECh. 2 - Prob. 2.107ECh. 2 - Remember that a resistant statistic is a numerical...Ch. 2 - Prob. 2.109ECh. 2 - Prob. 2.110ECh. 2 - Prob. 2.111ECh. 2 - Prob. 2.112ECh. 2 - Prob. 2.113ECh. 2 - Prob. 2.114ECh. 2 - Prob. 2.115ECh. 2 - Prob. 2.116ECh. 2 - Prob. 2.117ECh. 2 - Prob. 2.118ECh. 2 - Prob. 2.119ECh. 2 - Prob. 2.120ECh. 2 - Prob. 2.121ECh. 2 - Prob. 2.122ECh. 2 - The data for 103 women’s right handspans are shown...Ch. 2 - Prob. 2.124ECh. 2 - Prob. 2.125ECh. 2 - Prob. 2.126ECh. 2 - Prob. 2.127ECh. 2 - Prob. 2.128ECh. 2 - Prob. 2.129ECh. 2 - Prob. 2.130ECh. 2 - Prob. 2.131ECh. 2 - Prob. 2.132ECh. 2 - Prob. 2.133ECh. 2 - Prob. 2.134ECh. 2 - Prob. 2.135ECh. 2 - Explain why women’s heights are likely to have a...Ch. 2 - Prob. 2.137ECh. 2 - Use the pennstate 1 dataset on the companion...
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- STATE: How heavy a load (in pounds) is needed to pull apart pieces of Douglas fir 44 inches long and 1.5 inches square? Given are data from students doing a laboratory exercise. 33,190 31,860 32,590 26,520 33,280 32,320 33,020 32,030 30,460 32,700 23,040 30,930 32,720 33,650 32,340 24,050 30,170 31,300 28,730 31,920 We are willing to regard the wood pieces prepared for the lab session as an SRS of all similar pieces of Douglas fir. Engineers also commonly assume that characteristics of materials vary Normally. Suppose that the strength of pieces of wood like these follows a Normal distribution with standard deviation 3000 pounds. PLAN: We will estimate μ by giving a 95% confidence interval. SOLVE: Find the sample mean x¯ . (Enter your answer rounded to the nearest whole number.) x¯= Give a 95% confidence interval, [low, high] , for the mean load required to pull the wood apart. (Enter your answers rounded to the nearest whole number.) low=…arrow_forwardSTATE: How heavy a load (in pounds) is needed to pull apart pieces of Douglas fir 44 inches long and 1.51.5 inches square? Given are data from students doing a laboratory exercise. 33,190 31,860 32,590 26,520 33,280 32,320 33,020 32,030 30,460 32,700 23,040 30,930 32,720 33,650 32,340 24,050 30,170 31,300 28,730 31,920 To access the complete data set, click the link for your preferred software format: Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV CrunchIt! We are willing to regard the wood pieces prepared for the lab session as an SRS of all similar pieces of Douglas fir. Engineers also commonly assume that characteristics of materials vary Normally. Suppose that the strength of pieces of wood like these follows a Normal distribution with standard deviation 3000 pounds. PLAN: We will estimate ?μ by giving a 98% confidence interval. SOLVE: Find the sample mean ?¯ . (Enter your answer rounded to the nearest whole number.) ?¯= Give a 98% confidence…arrow_forward
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