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.
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Hypotheses
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H0: _ = 10 vs. _ > 10
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Level of Significance:
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0.01
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Decision Rule
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Reject the null hypothesis if p-value < 0.01
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Calculation:
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Hypothesis Test: Mean vs. Hypothesized Value
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Hypothesized value
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10.000
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Mean Sample
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14.400
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Std. dev.
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0.752
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n
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35
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5.85
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Z
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2.46E
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P-value
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