To test the effectiveness of a treatment, a sample of N= 36 is selected from a normal population with a meanof μ = 60 and a standard deviation of \sigma = 10.The mean for the sample is M = 55. We want to testwhether the treatment had an effect on scores. a.Using symbols, state the hypotheses (H0 and H1) for atwo-tailed test. b. Identify the decision criteria (criticalvalues) for \alpha .05, 2-tailed on the distributionbelow, using lines or arrows. c. Calculate the teststatistic (z) for the sample. d. Make a decisionregarding the hypothesis based on the results and writea conclusion sentence summarizing the results of theresearch.

a.Suppose is the population mean.The sample size is .The sample mean is, .The population standard…

Answered: To test the effectiveness of 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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The amount of time college students sleep each night is normally distributed with a mean of 6 and a standard deviation of 2.5. The amount of tiem high schoolers sleep each night is normally distributed with a mean of 8 hours and a standard deviation of 4 hours. Compare a college student whoe sleeps 4.5 hours with a high schooler who sleeps 6 hours a night. Use z-score in you anaylisis and show work.
PEF is a measure of patient's abiltity to expel air from lungs. PEF for children free of asthma is 306. investigator wants to know whether children with chronic bronchitis have restricted PEF. sample of 40 children with chronic bronchitis are studied, their mean PEF is 279, standard deviation 71. Is there stastical evidence of lower mean PEF in children with chronic bronchities? Run appropriate test at alpha = 0.05
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Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with \mu = 96 and \sigma = 27. (a) What proportion of children aged 13 to 15 years old have scores on this test above 78 ? (NOTE: Please enter your answer in decimal form. For example, 45.23% should be entered as 0.4523.) Answer: (b) Enter the score which marks the lowest 25 percent of the distribution. Answer: (c) Enter the score which marks the highest 15 percent of the distribution.
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A survey found that women's heights are normally distributed with a mean of 62.7 inches and a standard deviation of 3.7 inches. The survey also found that men`s heights are normally distributed with a mean of 69.8 inches and a standard deviation of 3.8 inches. Consider an executive jet that seats six with a driveway height of 56.1 inches. What percentage of adult men can fit through the door without bending?

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