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Get Full Access to Stats Modeling The World - 4 Edition - Chapter Part ii - Problem 7
Get Full Access to Stats Modeling The World - 4 Edition - Chapter Part ii - Problem 7

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# Acid rain Biologists studying the effects of acid rain on wildlife collected data from ISBN: 9780321854018 481

## Solution for problem 7 Chapter Part II

Stats Modeling the World | 4th Edition

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Problem 7

Acid rain Biologists studying the effects of acid rain on wildlife collected data from 163 streams in the Adirondack Mountains. They recorded the pH (acidity) of the water and the BCI, a measure of biological diversity, and they calculated R2 = 27,. Heres a scatterplot of BCI against pH: a) What is the correlation between pH and BCI? b) Describe the association between these two variables. c) If a stream has average pH, what would you predict about the BCI? d) In a stream where the pH is 3 standard deviations above average, what would you predict about the BCI?

Step-by-Step Solution:
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Statistics Week 4 Aids to the Interpretation of Box Plots 1. The line (median) inside the box represents the “center” of the distribution of data. S= {1, 3, 5, 6, 10, 12, 68} Median: 6 Q U : 12 QL : 3 *IQR= Inner Quartile Range= QU−Q L 2. Examine the length of the box. The IQR is a measure of the sample’s variability and is especially useful for the comparison of two samples. 3. Visually compare the lengths of the whiskers. If one is clearly longer, the distribution of the data set is probably skewed in the direction of the longer whisker (top longer- right skew; bottom longer-left skew). 4. Analyze any measurements that lie beyond the fences. Example: Mean= \$64,000

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##### ISBN: 9780321854018

Stats Modeling the World was written by and is associated to the ISBN: 9780321854018. This full solution covers the following key subjects: . This expansive textbook survival guide covers 31 chapters, and 1357 solutions. Since the solution to 7 from Part II chapter was answered, more than 316 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Stats Modeling the World, edition: 4. The full step-by-step solution to problem: 7 from chapter: Part II was answered by , our top Statistics solution expert on 03/16/18, 04:57PM. The answer to “Acid rain Biologists studying the effects of acid rain on wildlife collected data from 163 streams in the Adirondack Mountains. They recorded the pH (acidity) of the water and the BCI, a measure of biological diversity, and they calculated R2 = 27,. Heres a scatterplot of BCI against pH: a) What is the correlation between pH and BCI? b) Describe the association between these two variables. c) If a stream has average pH, what would you predict about the BCI? d) In a stream where the pH is 3 standard deviations above average, what would you predict about the BCI?” is broken down into a number of easy to follow steps, and 100 words.

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