A simple random sample of 100 8th graders at a large suburban middle school indicated that 87% of them are involved with some type of after school activity. Find the 95% confidence interval that estimates the proportion of them that are involved in an after school activity.

a)[0.804, 0.736]

b)[0.854, 0.859]

c)[0.804, 0.936]

d)[0.724, 0.936]

e)[0.704, 0.886]

f)None of the above

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