Q1) In 2004, small dealership leased 21 Chevrolet Impalas on 2-year leases. When cars were returned in 2006, mileage was recorded (see below).
|
40,060
|
24,960
|
14,310
|
17,370
|
44,740
|
44,550
|
44,550
|
|
33,380
|
24,270
|
41,740
|
58,630
|
35,830
|
25,750
|
28,910
|
|
25,090
|
43,380
|
23,940
|
43,510
|
53,680
|
31,810
|
36,780
|
Requirement 1:
National average for 2-year leases is 30,000 miles. Select the suitable hypothesis
H1: μ ≤ 30,000, reject H0 if t > 1.325
H1: μ > 30,000, reject H1 if t > 1.325
H0: μ > 30,000, reject H1 if t > 1.325
H0: μ ≤ 30,000, reject H0 if t > 1.325
Requirement 2:
Dealer illustrates significantly greater mean number of miles than national average at 10% level.