In a random sample of 8 people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.2 minutes. A 90% confidence interval using the t-distribution was calculated to be (30.7,40.3). After researching commute times to work, it was found that the population standard deviation is 9.2 minutes. Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results. ..... The margin of error of u is 5.35. (Round to two decimal places as needed.) A 90% confidence interval using the standard normal distribution is ( D (Round to one decimal place as needed.) ces

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
icon
Related questions
Question
Answer these question
In a random sample of 8 people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.2 minutes. A 90% confidence interval using
the t-distribution was calculated to be (30.7,40.3). After researching commute times to work, it was found that the population standard deviation is 9.2 minutes. Find
the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is
known. Compare the results.
The margin of error of u is 5.35
(Round to two decimal places as needed.)
A 90% confidence interval using the standard normal distribution is (| | D
(Round to one decimal place as needed.)
rces
prary
zions
Help Me Solve This
View an Example
Get More Help -
Clear All
Check Answer
pe here to search
68°F Clear
近
Transcribed Image Text:In a random sample of 8 people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.2 minutes. A 90% confidence interval using the t-distribution was calculated to be (30.7,40.3). After researching commute times to work, it was found that the population standard deviation is 9.2 minutes. Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results. The margin of error of u is 5.35 (Round to two decimal places as needed.) A 90% confidence interval using the standard normal distribution is (| | D (Round to one decimal place as needed.) rces prary zions Help Me Solve This View an Example Get More Help - Clear All Check Answer pe here to search 68°F Clear 近
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Recommended textbooks for you
A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability
A First Course in Probability
Probability
ISBN:
9780321794772
Author:
Sheldon Ross
Publisher:
PEARSON