Solve the Problem $\mathrm { p }$ Can Be Written As $\mathrm { p } < \hat { \mathrm { p } } + \mathrm { E }$

question 19

Multiple Choice

Solve the problem.
-A one-sided confidence interval for $\mathrm { p }$ can be written as $\mathrm { p } < \hat { \mathrm { p } } + \mathrm { E }$ or $\mathrm { p } > \hat { \mathrm { p } } - \mathrm { E }$ where the margin of error $\mathrm { E }$ is modified by replacing $\mathrm { z } _ { \alpha / 2 }$ with $\mathrm { z } _ { \alpha }$ . 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) \(\mathrm { p } < 0.167\)
• B) \(\mathrm { p } < 0.154\)
• C) \(\mathrm { p } < 0.062\)
• D) \(p > 0.062\)

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