×
×

# Solved: Assume that all variable are approximately ISBN: 9780073534985 75

## Solution for problem 8E 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

4 5 1 410 Reviews
14
2
Problem 8E

Assume that all variable are approximately normally distributed.

State Gasoline TaxesA random sample of state gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?

 38.4 40.9 67 32.5 51.5 43.4 38 43.4 50.7 35.4 39.3 41.4

Source http://www.api org statistics/fueltaxes/

Step-by-Step Solution:

Step 1 of 1</p>

(a)

We have a random sample of state gasoline taxes (in cents) is shown here for 12 states.

We are asked to find the estimate the true population mean gasoline tax with 90% confidence.

Does your interval contain the national average of 44.7 cents?

 38.4 40.9 67 32.5 51.5 43.4 38 43.4 50.7 35.4 39.3 41.4

We have given First, we will find the sample mean and sample standard deviation.      We need to find the confidence interval for the mean and is...

Step 2 of 3

Step 3 of 3

##### ISBN: 9780073534985

This full solution covers the following key subjects: gasoline, state, Taxes, cents, National. This expansive textbook survival guide covers 33 chapters, and 1015 solutions. Since the solution to 8E from 7.2 chapter was answered, more than 1513 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 8E from chapter: 7.2 was answered by , our top Statistics solution expert on 09/01/17, 05:46AM. This textbook survival guide was created for the textbook: Elementary Statistics: A Step By Step Approach , edition: 9. Elementary Statistics: A Step By Step Approach was written by and is associated to the ISBN: 9780073534985. The answer to “Assume that all variable are approximately normally distributed.State Gasoline TaxesA random sample of state gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?38.440.96732.551.543.43843.450.735.439.341.4Source http://www.api org statistics/fueltaxes/” is broken down into a number of easy to follow steps, and 51 words.

Unlock Textbook Solution