Maurice Tutor

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Expertise:
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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 30 Jan 2018 My Price 6.00

statistical inference change.

The following exercises are “what-if” analyses designed to deter- mine what happens to the test statistics and interval estimates when elements of the statistical inference change. These problems can be solved manually or using the Do-It-Yourself Excel spread- sheets you created.

 

12.3      a. A random sample of 25 was drawn from a popu- lation. The sample mean and standard deviation are x = 510 and s = 125. Estimate µ, with 95% confidence.

b.     Repeat part (a) with n = 50.

c.     Repeat part (a) with n = 100.

d.    Describe what happens to the confidence interval estimate when the sample size increases.

12.4     a. The mean and standard deviation of a sample of 100 is x = 1500 and s = 300. Estimate the popu- lation mean with 95% confidence.

b.     Repeat part (a) with s = 200.

c.     Repeat part (a) with s = 100.

d.    Discuss the effect on the confidence interval esti- mate of decreasing the standard deviation s.

 

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Maurice Tutor
(5)
Status NEW Posted 30 Jan 2018 11:01 PM My Price 6.00

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