Maurice Tutor

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About 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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Questions Answered: 66690
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Education

  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 03 Feb 2018 My Price 7.00

popu- lation variance

 

12.56      a. A random sample of 100 observations was drawn from a normal population. The sample variance was calculated to be s2 = 220. Test with a = .05 to determine whether we can infer that the popu- lation variance differs from 300.

b.     Repeat part (a) changing the sample size to 50.

c.     What is the effect of decreasing the sample size?

12.57      a. The sample variance of a random sample of 50 observations from a normal population was found to be s2 = 80. Can we infer at the 1% sig- nificance level that u2 is less than 100?

b.     Repeat part (a) increasing the sample size to 100.

c.     What is the effect of increasing the sample size?

12.58      a. Estimate u2 with 90% confidence given that

n = 15 and s2 = 12.

b.     Repeat part (a) with n = 30.

c.     What is the effect of increasing the sample size?

Answers

Maurice Tutor
(5)
Status NEW Posted 03 Feb 2018 09:02 PM My Price 7.00

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