A study is given to college students to determine the semester grades. The results are given...
A study is given to
college students to determine the semester grades.
The results are given in the frequency
distribution. Determine the probabilities
for each of the following. Use proper
symbolism.
|
Grade |
Frequency |
|
A- To A+ |
6 |
|
B- To B+ |
12 |
|
C- To C+ |
3 |
|
D- To D+ |
1 |
|
F or WF |
2 |
|
24 |
a. earned better than a D.
b. A student earned an A or B range grade.
c. A student earned neither an A nor F range grade.
d. A student earned at least a C range grade.
Homework Answers
Answer)
Total = 24
Probability is given by favorable/total
A)
Favorable = better than D = 3+12+6 = 21
Probability = 21/24 = 0.875
B)
Favorable = A or B = 6+12 = 18
Probability = 18/24 = 0.75
C)
Favorable = neither A nor F = 1+3+12 = 16
Probability = 16/24 = 0.6667
D)
Favorable = at least 6 = 3+12+6 = 21
Probability = 21/24 = 0.875
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