A random sample of ten examination papers in a course that was given on a pass or fail basis showed the following scores.
Paper Number
Grade
Status
1
65
Pass
2
87
Pass
3
92
Pass
4
35
Fail
5
79
Pass
6
100
Pass
7
48
Fail
8
74
Pass
9
79
Pass
10
91
Pass
?
a.What is the point estimate for the mean of the population?b.What is the point estimate for the standard deviation of the population?c.What is the point estimate for the proportion of all students who passed the course?
What will be an ideal response?
| a. | 75 |
| b. | 20.48 |
| c. | 0.8 |
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