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should be sent by 2day mail instead. Exceptions are allowed, but they want the average to be 10
or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding
a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance,
is the true mean greater than 10? (b) Use Excel to find the righttail pvalue.
H0: μ ≤ 10
H1: μ > 10
Hypothesiz
10
Sample Av
14.44
Sample Siz
35
Sample Va
19.803
Test Statist
5.903
pvalue
0.000001
α
0.010
αlevel critic
2.441
(a) Yes, at the .01 level of significance, the true mean is greater than 10
coin biased toward heads? Show your decision rule and calculations. (b) Calculate a pvalue and
interpret it.
0.500
Sample siz
60
Estimated p
0.633
Test statist
2.066
pvalue
0.019
α
0.100
αlevel critic
1.282
(a) Yes, the coin is biased toward heads since 2.1 > 1.3
(b) p = 0.019 The pvalue is the smallest possible value of alpha for which the given sample will lead to the decisi
same day they are received. If 485 out of the next 500 orders are processed on the same day, would
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 Spring '11

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