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?You Explain It! Cell Phone Rates Monthly charges for cell phone plans in the United States are normally distributed with mean ? = $62 and standard dev

Statistics: Informed Decisions Using Data | 5th Edition | ISBN: 9780134133539 | Authors: Michael Sullivan III ISBN: 9780134133539 240

Solution for problem 31 Chapter 7.1

Statistics: Informed Decisions Using Data | 5th Edition

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Statistics: Informed Decisions Using Data | 5th Edition | ISBN: 9780134133539 | Authors: Michael Sullivan III

Statistics: Informed Decisions Using Data | 5th Edition

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Problem 31

You Explain It! Cell Phone Rates Monthly charges for cell phone plans in the United States are normally distributed with mean μ = $62 and standard deviation σ = $18. Source: Based on information from Consumer Reports

(a) Draw a normal curve with the parameters labeled.

(b) Shade the region that represents the proportion of plans that charge less than $44.

(c) Suppose the area under the normal curve to the left of x = $44 is 0.1587. Provide two interpretations of this result.

Step-by-Step Solution:

Step 1 of 5) You Explain It! Cell Phone Rates Monthly charges for cell phone plans in the United States are normally distributed with mean μ = $62 and standard deviation σ = $18. Source: Based on information from Consumer Reports (a) Draw a normal curve with the parameters labeled. (b) Shade the region that represents the proportion of plans that charge less than $44. (c) Suppose the area under the normal curve to the left of x = $44 is 0.1587. Provide two interpretations of this result. StatCrunch Hypothesis Test on the Slope 1. Enter the explanatory variable in column var1 and the response variable in column var2. 2. Select Stat, highlight Regression, choose Simple Linear. Choose var1 for the X-variable, choose var2 for the Y-variable. Select the Hypothesis tests radio button. Choose the appropriate values in the null hypothesis for both the intercept and slope.

Step 2 of 2

Chapter 7.1, Problem 31 is Solved
Textbook: Statistics: Informed Decisions Using Data
Edition: 5
Author: Michael Sullivan III
ISBN: 9780134133539

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?You Explain It! Cell Phone Rates Monthly charges for cell phone plans in the United States are normally distributed with mean ? = $62 and standard dev