If the Estimated Population Proportion Is 30 Percent Based on Previous

question 12

Multiple Choice

If the estimated population proportion is 30 percent based on previous studies, the acceptable error is plus or minus 5 percent, and the z-value for a 95 percent level of confidence is 1.96, the needed sample size is approximately:

• A) 323.
• B) 187.
• C) 36.
• D) 212.
• E) 554.

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