AccountingQueen

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  • MBA.Graduate Psychology,PHD in HRM
    Strayer,Phoniex,
    Feb-1999 - Mar-2006

  • MBA.Graduate Psychology,PHD in HRM
    Strayer,Phoniex,University of California
    Feb-1999 - Mar-2006

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Category > Math Posted 29 Aug 2017 My Price 8.00

National Assessment of Educational Progress

The scores of 12th-grade students on the National Assessment of Educational Progress year 2000 mathematics test have a distribution that is approximately normal with mean of 300 and standard deviation of 35.

 

a) Choose one 12th-grader at random. What is the probability that his or her score is higher than 300? Higher than 335?

b) Now choose an SRS of four 12th-graders. What is the probability that their mean score is higher than 300? Higher than 335?

2. Now what are the conditions for using the normal approximation for a sampling distribution of means?

 

3. Describe the sampling distribution of x-bar for samples of size 20 drawn from a normal population with a mean of 50 and standard deviation of 4.

Answers

AccountingQueen
(3)
Status NEW Posted 29 Aug 2017 05:08 PM My Price 8.00

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