Maurice Tutor

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Algebra,Applied Sciences,Biology,Calculus,Chemistry,Economics,English,Essay writing,Geography,Geology,Health & Medical,Physics,Science Hide all
Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 09 Jul 2017 My Price 13.00

process of testing

12.10      a. A statistics practitioner is in the process of testing to determine whether there is enough evidence to infer that the population mean is different from 180. She calculated the mean and standard deviation of a sample of 200 observations  as x = 175 and s = 22. Calculate the value of the test statistic (and for Excel users, the p-value) of the test required to determine whether there is enough evidence at the 5% significance level.

b.     Repeat part (a) with s = 45.

c.     Repeat part (a) with s = 60.

d.    Discuss what happens to the t statistic (and for Excel users, the p-value) when the standard devi- ation increases.

12.11      a. Calculate the test statistic (and for Excel users, the p-value) when x = 145, s = 50, and n = 100. Use a 5% significance level.

H0:   m  = 150

H1:   m 6 150

 

b.     Repeat part (a) with x = 140.

c.     Repeat part (a) with x = 135.

d.    What happens to the t-statistic (and for Excel users, the p-value) when the sample mean decreases?

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Maurice Tutor
(5)
Status NEW Posted 09 Jul 2017 05:07 PM My Price 13.00

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