Reference no: EM1315200
Q1) Health insurance administrative costs are a concern for many companies which supply insurance for their employees. Information below is information collected recently. Let x be average number of employees in group health insurance plan and y be average administrative cost as percentage of claims. Determine sample correlation coefficient.
|
x
|
4
|
14
|
20
|
47
|
70
|
|
y
|
43
|
42
|
34
|
18
|
18
|
a. -0.914
b. -0.942
c. 0.887
d. 0.942
e. -0.887
Q2) Assume the table below illustrates percent y of preteens and teens aged 12-17 who "consumed alcohol in past month" in the given year.
|
X
|
1985
|
1990
|
1995
|
2000
|
|
Y
|
30
|
25
|
15
|
10
|
Forecast percent of teens aged 12-17 who would have "consumed alcohol in past month" in the year 2005.
a) 20.5 %
b) 0.03 %
c) 2.5 %
d) 3.3 %
e) 33.3 %
In current year, assume 24 % of Americans identified themselves as liberal, and 28
Q3) % as conservative. If 750 Americans are selected at arbitrary, how many people who recognized themselves as liberals and how many as conservatives would you expect?
a) 240 conservative; 125 liberal
b) 125 conservative; 128 liberal
c) 75 conservative; 108 liberal
d) 150 conservative; 100 liberal
e) 210 conservative; 180 liberal