Researcher use to create this confidence interval

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A researcher calculated a 75% confidence interval for the proportion of females in a class who wear hats on a regular basis. The interval constructed was determined to be 0.6 to 0.8.

What sample size did the researcher use to create this confidence interval? Note: if necessary, round your answers to the nearest whole number. Assume the necessary conditions were first verified for this confidence interval.

A. 9

B. 28

C. 33

D. Not enough information to determine.

Reference no: EM132286277

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