Estimate the probability that the grade

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A random sample of 10 examination papers in a course, which was given on a pass or fail basis, showed the following

Grade Status

85         pass

87         fail

92         pass

85         fail

79         pass

90         pass

88         fail

74         pass

79         fail

91         pass

1. Estimate the probability that the grade will be more than 85.

2. Estimate the probability that the proportion of fail will be less than 0.65.

3. Estimate the 97% confidence interval for Grade.

4. Estimate the interval of the proportion for pass at the 98% confidence level

Reference no: EM132232515

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