×
Log in to StudySoup
Get Full Access to Statistics - Textbook Survival Guide
Join StudySoup for FREE
Get Full Access to Statistics - Textbook Survival Guide

Answer: Assume that all variable are approximately

Elementary Statistics: A Step By Step Approach | 9th Edition | ISBN: 9780073534985 | Authors: Allan Bluman ISBN: 9780073534985 75

Solution for problem 11E Chapter 7.2

Elementary Statistics: A Step By Step Approach | 9th Edition

  • Textbook Solutions
  • 2901 Step-by-step solutions solved by professors and subject experts
  • Get 24/7 help from StudySoup virtual teaching assistants
Elementary Statistics: A Step By Step Approach | 9th Edition | ISBN: 9780073534985 | Authors: Allan Bluman

Elementary Statistics: A Step By Step Approach | 9th Edition

4 5 1 261 Reviews
25
2
Problem 11E

Assume that all variable are approximately normally distributed.

Distance Traveled to Work A recent Study of 28 employees of XYZ company showed that the mean of the distance they traveled to work was 14.3 miles. The standard deviation of the sample mean was 2 miles. Find the 95% confidence interval of the true mean. If a manager wanted to be sure that most of his employees would not be late, how much time would he suggest they allow for the commute if the average speed were 30 miles per hour?

Step-by-Step Solution:

Answer

Step 1 of 1</p>

(a)

The mean distance traveled by 28 employees of XYZ company was 14.3 miles.

The standard deviation of the sample mean was 2 miles.

We are asked to find the 95% CI of the true mean.

How much time would manager suggest they allow for the commute if the average speed were 30 miles per hour?

We have given

Formula for a Specific Confidence Interval for the Mean When  Is Unknown

The degrees of freedom are

We can calculate the value of  as,

Step 2 of 3

Chapter 7.2, Problem 11E is Solved
Step 3 of 3

Textbook: Elementary Statistics: A Step By Step Approach
Edition: 9
Author: Allan Bluman
ISBN: 9780073534985

Unlock Textbook Solution

Enter your email below to unlock your verified solution to:

Answer: Assume that all variable are approximately

×
Log in to StudySoup
Get Full Access to Statistics - Textbook Survival Guide
Join StudySoup for FREE
Get Full Access to Statistics - Textbook Survival Guide
×
Reset your password