A sample is selected from a population with A = 150. After a treatment is administered to the individuals, the sample mean is foundto be= 140 and the standard deviation is S= 9.If the sample has n = 18 scores, determine whether the sample is sufficient to conclude that the treatment has significant effect.Use a two tail test with a = 0.02. (Assume the population is normally distributed) The null hypothesis ( Ho)H = 140# 140H = 150+ 1508 Points

Answered: A sample is selected from a population…

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 standardized exam's scores are normally distributed. In a recent year, the mean test score was 1549 and the standard deviation was 319. The test scores of four students selected at random are 1950, 1270, 2280, and 1440. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1950 is (Round to two decimal places as needed.)
The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test had a mean of 40 and a standard deviation of 8. High School GPAs had a mean of 2.5 and a standard deviation of 0.2.What high school GPA do you need to equal a score of 42 on the Accuplacer test?Give answer to two decimal places.
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The scores on the Accuplacer test and High School GPAs are normally distributed.The Accuplacer test had a mean of 40 and a standard deviation of 8.High School GPAs had a mean of 2.6 and a standard deviation of 0.2.What high school GPA do you need to equal a score of 28 on the Accuplacer test?Give answer to two decimal places.
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