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8.1.1 WP For a normal population with known variance σ², answer the following questions: a. What is the confidence level for the interval - 2.140/ √√n≤μ≤x+2.140/√n? b. What is the confidence level for the interval - 2.490/ √√nx-2.496/√n≤μ≤ x+2.49/√n? c. What is the confidence level for the interval - 1.850/ √√n≤μ≤x+1.850/√n? μ d. What is the confidence level for the interval µ≤x+ 2.000/√n? e. What is the confidence level for the interval - 1.960/ 8.1.2 WP Consider the one-sided confidence interval expres- sions for a mean of a normal population. a. What value of z would result in a 90% CI? b. What value of zo would result in a 95% CI? c. What value of zo would result in a 99% CI? 8.1.3 A random sample has been taken from a normal distribu- tion and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05) a. What is the value of the sample mean? b. One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI and why?

8.1.1 WP For a normal population with known variance σ², answer the following questions: a. What is the confidence level for the interval - 2.140/ √√n≤μ≤x+2.140/√n? b. What is the confidence level for the interval - 2.490/ √√nx-2.496/√n≤μ≤ x+2.49/√n? c. What is the confidence level for the interval - 1.850/ √√n≤μ≤x+1.850/√n? μ d. What is the confidence level for the interval µ≤x+ 2.000/√n? e. What is the confidence level for the interval - 1.960/ 8.1.2 WP Consider the one-sided confidence interval expres- sions for a mean of a normal population. a. What value of z would result in a 90% CI? b. What value of zo would result in a 95% CI? c. What value of zo would result in a 99% CI? 8.1.3 A random sample has been taken from a normal distribu- tion and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05) a. What is the value of the sample mean? b. One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI and why?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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Answer questions 8.1.1, 8.1.2 and 8.1.3 respectively 

8.1.1 WP For a normal population with known variance σ², answer the following questions: a. What is the confidence level for the interval - 2.140/ √√n≤μ≤x+2.140/√n?
Transcribed Image Text:8.1.1 WP For a normal population with known variance σ², answer the following questions: a. What is the confidence level for the interval - 2.140/ √√n≤μ≤x+2.140/√n?
b. What is the confidence level for the interval - 2.490/ √√nx-2.496/√n≤μ≤ x+2.49/√n? c. What is the confidence level for the interval - 1.850/ √√n≤μ≤x+1.850/√n? μ d. What is the confidence level for the interval µ≤x+ 2.000/√n? e. What is the confidence level for the interval - 1.960/ 8.1.2 WP Consider the one-sided confidence interval expres- sions for a mean of a normal population. a. What value of z would result in a 90% CI? b. What value of zo would result in a 95% CI? c. What value of zo would result in a 99% CI? 8.1.3 A random sample has been taken from a normal distribu- tion and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05) a. What is the value of the sample mean? b. One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI and why?
Transcribed Image Text:b. What is the confidence level for the interval - 2.490/ √√nx-2.496/√n≤μ≤ x+2.49/√n? c. What is the confidence level for the interval - 1.850/ √√n≤μ≤x+1.850/√n? μ d. What is the confidence level for the interval µ≤x+ 2.000/√n? e. What is the confidence level for the interval - 1.960/ 8.1.2 WP Consider the one-sided confidence interval expres- sions for a mean of a normal population. a. What value of z would result in a 90% CI? b. What value of zo would result in a 95% CI? c. What value of zo would result in a 99% CI? 8.1.3 A random sample has been taken from a normal distribu- tion and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05) a. What is the value of the sample mean? b. One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI and why?
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