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Mary Examined a Random Sample of Friday Withdrawals from a College

Question 137

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Mary examined a random sample of Friday withdrawals from a college campus ATM. She hypothesized that the mean was less than $100. The results shown below are from MegaStat. What would Mary conclude from this test? Explain carefully.
Hypothesis Test: Mean vs. Hypothesized Value
100.000100.000 \quad \quad hypothesized value
85.88285.882 \quad \quad mean Withdrawal
85.07885.078 \quad \quad std. dev.
20.63420.634 \quad \quad std. error
1717 \quad \quad \quad \quad n
16 \quad \quad \quad \quad df
0.68- 0.68 \quad \quad \quad t
.2518.2518 \quad \quad p-value (one-tailed, lower)

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The p-value says that a sample mean such...

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