It is reported that a survey had a standard error of the mean of 20, and it is assumedthat the population standard deviation is 500. Using this information, determine thesize of the sample that was used in this survey.a) 300b) 200c) 400O d) 500() e) None of the answers are correct

Given information- Population standard deviation (σ) = 500 Standard error of the mean (SE) = 20 We…

Answered: It is reported that a survey had 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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Assume that the distribution of a college entrance exam is normal with a mean of 500 and a standard deviation of 100. For each score below, find the equivalent Z score, the percentage of the area above the score, and the percentage of the area below the score. ( 3 each = total 6 points) Score Z score % Area Above % Area Below a) 437 b) 526
The mean of 100 observations is 50 and their standard deviation is 5. The sum of all squares of all the observations is? A)250000 B) 50000 C)252500 D)255000
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It is reported that a survey had a standard error of the mean of 20, and it is assumed that the population standard deviation is 500. Using this information, determine the size of the sample that was used in this survey. O a) 300 ОБ 200 c) 400 d) 500 e) None of the answers are correct