QUESTION 6 Zappos thinks that the average weight of outgoing orders is less than

Question

QUESTION 6 Zappos thinks that the average weight of outgoing orders is less than 6 lbs. A sample of 25 packages are weighted and found to weight 5 95 lbs with a sample standard deviation is 0 6 Use hypothesis testing at the 5% level and select the best ansNer O a Zappos statement is correct because the 6.18 falls in the DNR region O b. The alternative hypothesis is incorrect because 6.18 is less than 6235 C The null hypothesis is incorrect because 6.18 fall outside the DNR region. O d Zappos is incorrect because the lower value that defines the DNR region is 5 8

Explanation / Answer

The statistica software output for this problem is:

One sample T summary hypothesis test:
? : Mean of population
H0 : ? = 6
HA : ? < 6

Hypothesis test results:

Hence,

Option D is correct.

Mean Sample Mean Std. Err. DF T-Stat P-value ? 5.95 0.12 24 -0.41666667 0.3403

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