1)  27.5
2)  27 & 35 (bimodal)
3)  297.1
4)  z=1.8771, no.
5) 56th
6)  A
7)  11.4
8)  68.5
9)  275 to 68 against, also written as 275:68
10) .523
11) .538
12) .4508
13) .511
14) .586
15) .067, no.
16) (23.62, 28.14)
17) .05
18) 255
19) (66.5, 73.9)
20) do not reject Ho: mean=25 at the .01 level
21) do not reject Ho: mean=13.7 at the .05 level
22) r = .5641 > .361 (critical value from A-6), Significant at the .05 level
23) y = 2.864 + .696x
24) r = .7354
25) at the .05 level, predicted y = 74.44 (sub in regression line)
    at the .01 level, predicted y = 77.2 (average y)