The following is based upon information from the Statistical abstract of United States, Dec, 1992. In this table the columns are years in which students graduated from the college with the Bachelor's degree. The rows are high school grade average for such students. In 1976, therefore, a random sample of 577 new college students showed that 419 had the high school average of A, 123 had the grade of B and so on. (Employ the chart for questions 31 - 40.) Write down answers in decimal form.
|
High School
Grade Average
|
1976
|
1980
|
1986
|
Total
|
|
A
|
419
|
593
|
607
|
1619
|
|
B
|
123
|
249
|
280
|
652
|
|
C
|
24
|
61
|
77
|
162
|
|
D
|
11
|
36
|
45
|
92
|
|
Total
|
577
|
939
|
1009
|
2525
|
- Evaluate P(C)
- Evaluate P(1980)
- Evaluate P(B | 1986)
- Evaluate P(1986 | A)
- Evaluate P (1976 | D)
- Evaluate P(A or B)
- Evaluate P(C or 1976)
- Evaluate P(A and D)
- Are A and B mutually exclusive?
- Are C and 1986 mutually exclusive?