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# observations on various characteristics were made using

ISBN: 9780321629111 32

## Solution for problem 46E Chapter 1

Probability and Statistics for Engineers and the Scientists | 9th Edition

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Problem 46E

observations on various characteristics were made using minichamheis of three different types: (1) cooler (PVC frames covered with shade cloth), (2) control (PVC frames only), and (3) warmer (PVC frames covered with plastic). One of the article's authors kindly supplied the accompany-ing data on the difference between air and soil temperatures (°C). a. Compare measures of center for the three different samples. b. Calculate, interpret, and compare the standard deviations for the three different samples. c. Do the fourth spreads for the three samples convey the same message as do the standard deviations about relative variability? d. Construct a comparative boxplot (which was included in the cited article) and comment on any interesting features.

Step-by-Step Solution:

Answer: Step 1 of 4 a. Compare measures of center for the three different samples. Arranging the data in increasing order Using Excel function =median( ) Cooler Control Warmer 0.83 0.53 0.12 1.26 1.12 0.84 1.34 1.52 1.58 1.43 1.78 1.91 1.57 1.84 1.93 1.59 1.9 2.13 1.72 1.92 2.3 1.76 2 2.31 1.79 2.03 2.53 1.86 2.19 2.57 1.88 2.45 2.6 1.9 2.65 1.91 2.74 2.34 2.86 2.41 Median 1.76 1.9 2.305 Stdev 0.400835 0.531321 0.777873 Since all three distributions are somewhat skewed and two contain outliers, medians are the more appropriate central measures. The medians are Cooler: 1.760°C, Control: 1.900°C, Warmer: 2.305°C The median difference between air and soil temperature increases as the conditions of the mini chambers transition from cooler to warmer (1.76 < 1.9 < 2.305). Step 2 of 4 b. Calculate, interpret, and compare the standard deviations for the three different samples. Using Excel function = stdev( ) With the aid of software, the standard deviations are Cooler: 0.401°C, Control: 0.531°C, Warmer: 0.778°C For the 15 observations under the “cooler” conditions, the typical deviation between an observed temperature difference and the mean temperature difference (1.760°C) is roughly 0.4°C. A similar interpretation applies to the other two standard deviations. We see that, according to the standard deviations, variability increases as the conditions of the mini chambers transition from cooler to warmer (0.401 < 0.531 < 0.778).

Step 3 of 4

Step 4 of 4

##### ISBN: 9780321629111

Since the solution to 46E from 1 chapter was answered, more than 848 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Probability and Statistics for Engineers and the Scientists, edition: 9. The answer to “observations on various characteristics were made using minichamheis of three different types: (1) cooler (PVC frames covered with shade cloth), (2) control (PVC frames only), and (3) warmer (PVC frames covered with plastic). One of the article's authors kindly supplied the accompany-ing data on the difference between air and soil temperatures (°C). a. Compare measures of center for the three different samples. b. Calculate, interpret, and compare the standard deviations for the three different samples. c. Do the fourth spreads for the three samples convey the same message as do the standard deviations about relative variability? d. Construct a comparative boxplot (which was included in the cited article) and comment on any interesting features.” is broken down into a number of easy to follow steps, and 114 words. This full solution covers the following key subjects: frames, pvc, Samples, article, standard. This expansive textbook survival guide covers 18 chapters, and 1582 solutions. The full step-by-step solution to problem: 46E from chapter: 1 was answered by , our top Statistics solution expert on 05/06/17, 06:21PM. Probability and Statistics for Engineers and the Scientists was written by and is associated to the ISBN: 9780321629111.

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