Your statistics instructor wants you to determine a confidence interval estimate for the mean test score. Past experience indicated that tests scores are normally distributed with a sample mean of 160 and a population standard deviation of 45. The critical value to estimate a 95% confidence interval of the population means is A. 1.645 B. 1.96
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score. Past experience indicated that tests scores are normally distributed with a sample mean of 160 and a population standard deviation of 45. The critical value to estimate a 95% confidence interval of the population means is A. 1.645 B. 1.96
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...
Related questions
Question
![QUESTION 7
Your statistics instructor wants you to determine a
confidence interval estimate for the mean test score.
Past experience indicated that tests scores are
normally distributed with a sample mean of 160 and a
population standard deviation of 45. The critical value
to estimate a 95% confidence interval of the population
means is
A. 1.645
B. 1.96
OC. 2.021
D. 1.684](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F59fc304e-f174-4073-beaa-c91da01ee65e%2Ff2e00c4f-efb4-41ea-835a-63c6db3cad47%2Fploz1pl_processed.jpeg&w=3840&q=75)
Transcribed Image Text:QUESTION 7
Your statistics instructor wants you to determine a
confidence interval estimate for the mean test score.
Past experience indicated that tests scores are
normally distributed with a sample mean of 160 and a
population standard deviation of 45. The critical value
to estimate a 95% confidence interval of the population
means is
A. 1.645
B. 1.96
OC. 2.021
D. 1.684
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
Step 1
Given Information:
Sample mean
Population standard deviation
Confidence level is 95%
Significance level
Step by step
Solved in 2 steps with 1 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Recommended textbooks for you
![A First Course in Probability (10th Edition)](https://www.bartleby.com/isbn_cover_images/9780134753119/9780134753119_smallCoverImage.gif)
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
![A First Course in Probability](https://www.bartleby.com/isbn_cover_images/9780321794772/9780321794772_smallCoverImage.gif)
![A First Course in Probability (10th Edition)](https://www.bartleby.com/isbn_cover_images/9780134753119/9780134753119_smallCoverImage.gif)
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
![A First Course in Probability](https://www.bartleby.com/isbn_cover_images/9780321794772/9780321794772_smallCoverImage.gif)