Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

A study was conducted to determine the mean cost to repair a mobile device. Assume that the population is normally distributed. A sample of 12

A study was conducted to determine the mean cost to repair a mobile device. Assume that the population is normally distributed. A sample of 12 devices was randomly selected. The sample mean was $90.42 and the sample standard deviation was $33.61.

a. What is the point estimate of population mean?

b. To construct 95% confidence interval for population mean, find the degree of freedom.

c. To construct 95% confidence interval for population mean, find the critical value.

d. To construct 95% confidence interval for population mean, calculate the margin of error.

e. Construct 95% confidence interval for population mean.

f. Interpret the confidence interval in part e.

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Introduction To Probability Models

Authors: Sheldon M Ross

10th Edition

0123756863, 9780123756862

More Books

Students also viewed these Mathematics questions