(1 point) A random sample of 100 observations from a population with standard deviation 7.22257393008022 yielded a sample mean of 91.2.(a) Given that the null hypothesis is u = 90 and the alternative hypothesis isu > 90 using a = .05, find the following:(i) critical z score(ii) test statistic =(b) Given that the null hypothesis is u = 90 and the alternative hypothesis is u + 90 using a = .05, find the following:(1) the positive critical z score(ii) the negative critical z score(iii) test statistic =

a) Given : Given data : sample size, n = 100 sample mean, x̄ = 91.2 population…

Answered: (a) Given that the null hypothesis is u…

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 body weight of a healthy 3-month-old colt should be about ? = 66 kg. I need help with (a) (b) and (c)
You are conducting a hypothesis test where the null hypothesis is that mu is less than or equal to 850. You are testing at the 0.01 significance level. You take a sample of size 64 and calculate your test statistic to be -1.50. What would your test statistic be if, rather than mu<= 850, your null hypothesis was that mu >= 850?
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Professor Nord stated that the mean score on the final exam from all the years he has been teaching is a 79%. Colby was in his most recent class, and his class’s mean score on the final exam was 82%. Colby decided to run a hypothesis test to determine if the mean score of his class was significantly greater than the mean score of the population. α = .01. What is the mean score of the population? What is the mean score of the sample? Is this test one-tailed or two-tailed? Why?
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