Joe Giancarlo in interested in reducing the driving time required for delivering pizzas. Joe believes equipping...

Joe Giancarlo in interested in reducing the driving time required for delivering pizzas. Joe believes equipping his delivery crew with GPS devices will greatly reduce time to delivery, so he randomly equips 16 of his drivers with a GPS and randomly selects another 11 drivers who are not equipped with GPS.

The results were as follows:

	N	Average Delivery Time	Standard Deviation
GPS	16	9.438	2.159
No GPS	11	11.000	2.490

Determine with an alpha of 0.01 whether deliveries where a GPS device is used are faster than deliveries where one is not.

State your null and alternate hypotheses:

Calculate your point estimate.

Calculate the standard error.

How many degrees of freedom?_____________
Is this test single- or two-tailed?_________________
Compute your test statistic

What is the critical t-value for this level of significance and degrees of freedom?_____
What is Joe’s decision?

Expert Solution

orchestra answered 2 years ago

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