A population has a standard deviation of 25. A random sample of 125 items from this population is selected. The sample mean is determined to be 325. At 95% confidence, the margin of error is O a. 2.24. Ob. 5. Oc. 4.38. Od. 11.18.
A population has a standard deviation of 25. A random sample of 125 items from this population is selected. The sample mean is determined to be 325. At 95% confidence, the margin of error is O a. 2.24. Ob. 5. Oc. 4.38. Od. 11.18.
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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#25

Transcribed Image Text:**Question 24**
From a population with a variance of 484, a sample of 256 items is selected. At 95% confidence, the margin of error is:
- a. 16
- b. 1.375
- c. 2.695
- d. 22
**Question 25**
A population has a standard deviation of 25. A random sample of 125 items from this population is selected. The sample mean is determined to be 325. At 95% confidence, the margin of error is:
- a. 2.24
- b. 5
- c. 4.38
- d. 11.18
**Question 26**
In order to determine an interval for the mean of a population with unknown standard deviation, a sample of 58 items is selected. The mean of the sample is determined to be 36. The associated number of degrees of freedom for reading the t value is:
- a. 35
- b. 36
- c. 57
- d. 58
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