Upper bound or limit of confidence interval

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The superintendent of a unified school district of a small town wants to make sure that no more than 5% of the students skip more than 10 days of school in a year. A random sample of 145 students from a population of 800 showed that 12 students skipped more than 10 days of school last year. What is the upper bound or limit of the 95% confidence interval for the proportion of students who skipped more than 10 days of school last year

A) .1978

B) .1168

C) .1231

D) .1268

Reference no: EM13104328

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