PRACTICE TEST #5 (SOLUTIONS)

5. so the mean is 9.5

so the standard deviation is

11.

A) Mean 10+2 = 12 Variance 6

B) Mean 10-8 = 2 Variance 6+4 = 10

C) Mean (1/5)10 = 2 Variance

25. Row 6 is:

6 26700 40484 28341 25428 08806 98858 04816 16317 94928 05512

Label the counties as follows:

01 Adams County
02 Alamosa County
03 Arapahoe County
04 Archuleta County
05 Baca County
06 Bent County
07 Boulder County
08 Broomfield, City and County of
09 Chaffee County
10 Cheyenne County
11 Clear Creek County
12 Conejos County
13 Costilla County
14 Crowley County
15 Custer County
16 Delta County
17 Denver, City And County of
18 Dolores County
19 Douglas County
20 Eagle County
21 El Paso County
22 Elbert County
23 Fremont County
24 Garfield County
25 Gilpin County
26 Grand County
27 Gunnison County
28 Hinsdale County
29 Huerfano County
30 Jackson County
31 Jefferson County
32 Kiowa County
33 Kit Carson County
34 La Plata County
35 Lake County
36 Larimer County
37 Las Animas County
38 Lincoln County
39 Logan County
40 Mesa County
41 Mineral County
42 Moffat County
43 Montezuma County
44 Montrose County
45 Morgan County
46 Otero County
47 Ouray County
48 Park County
49 Phillips County
50 Pitkin County
51 Prowers County
52 Pueblo County
53 Rio Blanco County
54 Rio Grande County
55 Routt County
56 Saguache County
57 San Juan County
58 San Miguel County
59 Sedgwick County
60 Summit County
61 Teller County
62 Washington County
63 Weld County
64 Yuma County

We pick counties 26, 70(ignore), 04, 04(repeat, ignore), 84(ignore), 28, 34, 12, and 54. Our SRS is Grand, Archuleta, Hinsdale, La Plata, Conejos, and Rio Grande.

]

26. Doctor C may be an open-heart surgeon, while the other doctors may specialize in less risky surgeries.

27. Biased in favor of national health care since it gives some of the advantages of a national health care system and no disadvantages.

28. Probably too high. In fact the results of the Greta poll showed that 65% have always have very strongly approved of President Bush! WOW! Oh yeah, this polls don’t mean a darn thing, where is my Beavis and Butthead DVD? I would be smarter if I watched them instead of paying attention to the Greta poll!

29. A) NO WAY.

B)

C)

D)

38. no

39. nothing

41. A) 10% B) 1 – 33nCr0 (.10)^0 (.90)^33 = .9691 C) no

47. None, a freshman class would be biased toward younger ages and the p-value is assuming no bias.