Answered: A sample mean, sample size,…

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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A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below.

x=24,

n=33,

σ=3,

confidence level=95%

a. Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn.

The confidence interval is from _______ to ___________

(Type integers or decimals rounded to one decimal place as needed.)

b. Obtain the margin of error by taking half the length of the confidence interval.

What is the length of the confidence interval? _______________

(Type an integer or decimal rounded to one decimal place as needed.)

c. Obtain the margin of error by using the formula E=zα2•σn.

Identify the critical value.

zα2=________________

(Type an integer or decimal rounded to two decimal places as needed.)

What is the margin of error obtained using the methods of parts (b) and (c)?

_____________

(Type an integer or decimal rounded to one decimal place as needed.)

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