47 48 22 26 45 DA survey of 25 randomly selected customers found the ages shown (in years). The mean is 33.16 years and the standard deviation is 9.89 years.a) Construct a 99% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met.b) How large is the margin of error?c) How would the confidence interval change if you had assumed that the standard deviation was known to be 10.0 years?29 34 39 25 3512 33 3426 37 27 33 3738 28 30 44 4611a) What is the confidence interval?(Round to two decimal places as needed.)b) What is the margin of error?The margin of error is.(Round to two decimal places as needed.)c) What is the confidence interval using the given population standard deviation? Select the correct choice below and fill in the answer boxes within your choice.(Round to two decimal places as needed.)O A. The new confidence interval) is wider than the interval from part aO B. The new confidence intervalis narrower than the interval from part a.

Given: n = 25 X = 33.16 S = 9.89 Formula Used: Confidence Interval = X ± Sntn-1 {When…

A survey of 25 randomly selected customers found the ages shown (in years). The mean is 33.16 years and the standard deviation is 9.89 years. a) Construct a 99% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of error? c) How would the confidence interval change if you had assumed that the standard deviation was known to be 10.0 years? 47 48 22 26 450 29 34 39 25 35 33 34 43 11 26 37 27 33 37 28 30 44 46 a) What is the confidence interval? (Round to two decimal places as needed.) b) What is the margin of error? The margin of error is. (Round to two decimal places as needed.) c) What is the confidence interval using the given population standard deviation? Select the correct choice below and fill in the answer boxes within your choice. (Round to two decimal places as needed.) O A. The new confidence interval (. ) is wider than the interval from part a. O B. The new confidence interval ( is narrower than the interval from part a.

A survey of 25 randomly selected customers found the ages shown (in years). The mean is 33.16 years and the standard deviation is 9.89 years. a) Construct a 99% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of error? c) How would the confidence interval change if you had assumed that the standard deviation was known to be 10.0 years? 47 48 22 26 450 29 34 39 25 35 33 34 43 11 26 37 27 33 37 28 30 44 46 a) What is the confidence interval? (Round to two decimal places as needed.) b) What is the margin of error? The margin of error is. (Round to two decimal places as needed.) c) What is the confidence interval using the given population standard deviation? Select the correct choice below and fill in the answer boxes within your choice. (Round to two decimal places as needed.) O A. The new confidence interval (. ) is wider than the interval from part a. O B. The new confidence interval ( is narrower than the interval from part a.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

47 48 22 26 45 D
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 33.16 years and the standard deviation is 9.89 years.
a) Construct a 99% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met.
b) How large is the margin of error?
c) How would the confidence interval change if you had assumed that the standard deviation was known to be 10.0 years?
29 34 39 25 35
12 33 34
26 37 27 33 37
38 28 30 44 46
11
a) What is the confidence interval?
(Round to two decimal places as needed.)
b) What is the margin of error?
The margin of error is.
(Round to two decimal places as needed.)
c) What is the confidence interval using the given population standard deviation? Select the correct choice below and fill in the answer boxes within your choice.
(Round to two decimal places as needed.)
O A. The new confidence interval
) is wider than the interval from part a
O B. The new confidence interval
is narrower than the interval from part a.

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