# Question posted by collegejunkee

## collegejunkee from

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## Questions Posted by collegejunkee

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\$0.75 Closed, closed Mathematics Statistics Statistics Question
A random sample of 41 observations was selected from a normally distributed population. The sample mean was x bar= 46, and the sample variance was s 2 = 68.0. Does the sample show sufficient reason...
Dec. 16, 2009
\$0.50 Closed, closed Mathematics Statistics Statistics Question
A sample of size n = 20 is selected from a normal population to construct a 98% confidence interval estimate for a population mean. The interval was computed to be (6.80 to 11.20). Determine the...
Dec. 16, 2009
\$0.75 Closed, closed Mathematics Statistics Statistics Question
A machine produces 3-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows: 3.02  2.95  2.96  2.96  2.90  2.92  3.02  2.93  3.07  3.07  3.00  2.91...
Dec. 16, 2009
\$2.00 Closed, closed Mathematics Statistics Statistics Question
Two groups of ten sprinters run 100 meters.  The times required by sprinters in the first group are as follows: 10.7  11.6  14.9  12.4  13.2  10.3  10.4  12.1  11.8  10.8 The times required by...
Dec. 13, 2009
\$2.00 Closed, closed Mathematics Statistics Statistics Question
A telephone survey gives 11 consumers two choices: Do they prefer Coke or Pepsi?  Exactly 9 of those surveyed state that they prefer Coke.  Assuming that  = 0.02, test the hypothesis that the...
Dec. 13, 2009
\$1.00 Closed, closed Mathematics Statistics Statistic Question
The US Mint selects ten pennies from the production line to test the hypothesis that the mean weight of each penny is 4 grams.  The normally-distributed weights (in grams) of these pennies are as...
Dec. 13, 2009