A One-Sided Confidence Interval for P Can Be Written As p

question 11

Multiple Choice

A one-sided confidence interval for p can be written as $p < \hat { p } + \mathrm { E } \text { or } p > \hat { p } - \mathrm { E }$ where the margin of error E is modified by replacing $z _ { \alpha / 2 }$ with $z _ { \alpha }$ 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 74 students results in 8 who fail the test.

• A) p<0.062
• B) p<0.154
• C) p>0.062
• D) p<0.167

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