In the EAI sampling problem, the population mean is $71,400 and the population standard deviation is $5000, For n-20, there is a 0.4108 probability of obtaininga sample mean within +8600 of the population mean. Use z-table.a. What is the probability that is within $600 of the population mean if a sample of size 40 (to 4 decimals)?b. Answer part (o) for a sample of size 80 (to 4 decimals).

Answered: In the EAI sampling problem, the…

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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13. A sample consists of the following n = 5 scores: 11 1 3 7 3 a. Compute the mean and standard deviation in the sample b. Find the z-scores for each score in the sample
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A variable of a population has a mean of µ = 82 and a standard deviation of o = 9. a. Identify the sampling distribution of the sample mean for samples of size 81. b. In answering part (a), what assumptions did you make about the distribution of the variable? c. Can you answer part (a) if the sample size is 25 instead of 81? Why or why not? a. What is the shape of the sampling distribution? normal uniform skewed O bimodal What is the mean of the sampling distribution? Hi = (Simplify your answer.) What is the standard deviation of the sampling distribution? (Simplify your answer.) b. In answering part (a), what assumptions did you make about the distribution of the variable? A. It was assumed that the variable was normally distributed. B. No assumptions were made because, for a relatively large sample size, the sampling distribution is normal, regardless of the distribution of the variable under consideratio
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. A division-wide aptitude test in Mathematics was conducted to 1000 pupils. The mean of the test is 58 and the standard deviation is 12. The scores also approximate the normal population.a. What is [the minimum score to belong to the upper 10% of the group?
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