A researcher with the Ministry of Transportation is commissioned to study the dr

Question

A researcher with the Ministry of Transportation is commissioned to study the drive times to work (one-way) for U.S. cities. The underlying hypothesis is that average commute times are different across cities. To test the hypothesis, the researcher randomly selects six people from each of the four cities and records their one-way commute times to work. Refer to the below data on one-way commute times (in minutes) to work. Note that the grand mean is 36.625.

  

Which of the following is the mean square for treatments?

a. 18,567.63

b. 13,281.79

c. 5,285.83

d. 4,427.26

Houston Charlotte Tucson Akron 45 25 25 10 65 30 30 15 105 35 19 15 55 10 30 10 85 50 10 5 90 70 35 10 74.167 36.667 24.833 10.833 524.167 436.667 82.167 14.167

Explanation / Answer

option B is correct

Grade ni x?i S2i ni*(Xi-Xgrand)2 houston 6 74.167 524.167 8456.411 Charl;otte 6 36.667 436.667 0.011 Tuscon 6 24.833 82.167 834.308 Akron 6 10.833 14.167 3991.364 36.625 13282.092

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.