28. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size isnecessary to double the standard error of the mean?2002540050O O

Given: Standard deviationσ=15 and sample sizen=100. Formula used: Standard Error=σn To find: Sample…

Answered: 28. The standard deviation of a…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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25. Most of schools require applications for admission to take Graduate Management admission GMAT examination. Scores for this GMAT is normally distributed with a mean of 580 and standard deviation of 13. How high must an individual score on GMAT to score in the lowest 5%. II
29. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size sample is need to cut the standard deviation of the mean in half? 200 50 25 400 O O O
Here are the monthly wage scales of 8 workers from XYZ Knit Works. 15 13 18 12 21 13 26 22 a. Determine the mean of the workers' wages. Answer in exact fraction, or rounded to at least 4 decimal places b. Determine the variance of the workers' wages. Answer in exact fraction, or rounded to at least 4 decimal places
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28. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size is necessary to double the standard error of the mean? 200 25 400 50