(a) Construct a 95% confidence interval about μ if the sample size, n, is 35. Lower bound: Upper bound: (Use ascending order. Round to two decimal places as needed.) Part 2 (b) Construct a 95% confidence interval about μ if the sample size, n, is 51. Lower bound: Upper bound: (Use ascending order. Round to two decimal places as needed.) Part 3 How does increasing the sample size affect the margin of error, E? A. The margin of error increases. B. The margin of error decreases. C. The margin of error does not change. Part 4
(a) Construct a 95% confidence interval about μ if the sample size, n, is 35. Lower bound: Upper bound: (Use ascending order. Round to two decimal places as needed.) Part 2 (b) Construct a 95% confidence interval about μ if the sample size, n, is 51. Lower bound: Upper bound: (Use ascending order. Round to two decimal places as needed.) Part 3 How does increasing the sample size affect the margin of error, E? A. The margin of error increases. B. The margin of error decreases. C. The margin of error does not change. Part 4
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
A simple random sample of size n is drawn. The sample mean,
x,
is found to be
19.1,
and the sample standard deviation, s, is found to be
4.1.
(a) Construct a
95%
confidence interval about
μ
if the sample size, n, is
35.
Lower bound:
Upper bound:
(Use ascending order. Round to two decimal places as needed.)
Part 2
(b) Construct a
95%
confidence interval about
μ
if the sample size, n, is
51.
Lower bound:
Upper bound:
(Use ascending order. Round to two decimal places as needed.)
Part 3
How does increasing the sample size affect the margin of error, E?
The margin of error increases.
The margin of error decreases.
The margin of error does not change.
Part 4
(c) Construct a
99%
confidence interval about
μ
if the sample size, n, is
35.
Lower bound:
Upper bound:
(Use ascending order. Round to two decimal places as needed.)
Part 5
Compare the results to those obtained in part (a). How does increasing the level of confidence affect the size of the margin of error, E?
The margin of error decreases.
The margin of error increases.
The margin of error does not change.
Part 6
(d) If the sample size is
12,
what conditions must be satisfied to compute the confidence interval?The sample data must come from a population that is normally distributed with no outliers.
The sample size must be large and the sample should not have any outliers.
The sample must come from a population that is normally distributed and the sample size must be large
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