A random sample of 10 examination papers in a course which w

A random sample of 10 examination papers in a course, which was given on a pass or fall basis, showed the following scores. Refer to Exhibit 7-2. The point estimate for the proportion of all students who passed the course is: 0.8 1.2 0.2 1.8

Solution

There are 8 who passed out of 10.

Thus, x= 8, n = 10, so

p^ = x/n = 8/10 = 0.8 [ANSWER, A]