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# Hypothesis Testing:Oh Baby! Gifts & Oxnard accounting majors

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The Web-based company Oh Baby! Gifts have a goal of processing 95 percent of its orders on the same day they are received. If 365 out of the next 375 orders are processed on the same day, would this prove that they are exceeding their goal, using &#945; = .01? Explain your decision.

AND

At Oxnard University, a sample of 18 senior accounting majors showed a mean cumulative GPA of 3.35 with a standard deviation of 0.25. At &#945; = .05 in a two-tailed test, does this differ significantly from 3.25 (the mean GPA for all business school seniors at the university)? Explain.

Hypothesis Test: Mean vs. Hypothesized Value

3.2500 hypothesized value
3.3500 mean problem4
0.2500 std. dev.
0.0589 std. error
18 n
17 df

1.70 t
.1079 p-value (two-tailed)

3.2257 confidence interval 95.% lower
3.4743 confidence interval 95.% upper
0.1243 half-width