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Q1) Faced with increasing fax costs, firm issued guideline that transmissions of 10 pages or more must be sent by 2-day mail instead. Exceptions are permitted, but they wish the average to be 10 or below. Firm examined 35 arbitrarily selected fax transmissions during next year, yielding sample mean of 14.44 with standard deviation of 4.45 pages.
(a) At.01 level of significance, is true mean greater than 10?
(b) Make use of Excel to determine the right-tail p-value.
Hypotheses
H0: _ = 10 vs. _ > 10
Level of Significance:
0.01
Decision Rule
Reject the null hypothesis if p-value < 0.01
Calculation:
Hypothesis Test: Mean vs. Hypothesized Value
Hypothesized value
10.000
Mean Sample
14.400
Std. dev.
0.752
n
35
5.85
Z
2.46E
P-value
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