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A researcher wants to estimate a 72% confidence interval for a proportion. What is the value of z that the researcher should use to construct

A researcher wants to estimate a 72% confidence interval for a proportion. What is the value of z that the researcher should use to construct this interval?

A. -0.77
B. 1.08
C. 1.28
D. 1.96
E. This is not possible. We can only estimate 90, 95, and 99% confidence intervals.

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