Question: A one-sided confidence interval for p can be written as p < + E or p > - E where the margin of error E

A one-sided confidence interval for p can be written as p < + E or p > - E where the margin of error E is modified by replacing z/2 with z. If a teacher wants to report that the fail rate on a test is at most x with 90% confidence, construct the appropriate one-sided confidence interval. Assume that a simple random sample of 70 students results in 5 who fail the test

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