MATH_221_MORE_MODULE_6_HINTS_SU_10

# MATH_221_MORE_MODULE_6_HINTS_SU_10 - My Known Values E =...

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MATH_221_MORE_MODULE_6_HINTS_SU_10 D. Determining the Sample Size for a Confidence Interval for µ -   Known   σ

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My Known Values E   = \$ 5 maximum error of estimate σ    = \$ 25 ( population standard deviation ) Confidence Interval is 95 % ( z  c  = 1.96 ) My Unknown Value(s)  the sample size My Formulas n   =  (  z   c       /     )  2 n   =  ( 1.96 × 25 /  5    )  2 n   =  ( 1.96 × 5    )  2 n   =  96.04 or 97 whole people  My Analysis
E. Determining the Sample Size for a Confidence Interval for a Population Proportion

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Unformatted text preview: My Known Values E = 0.06 maximum error of estimate Confidence Interval is 99 % ( z c = 2.58 ) Assume p _hat = 50% q _hat = 1 - p _hat = 1 – 50% = 50% My Unknown Value(s) n the sample size My Formulas n = ( p _hat × q_hat ) ( z c / E ) 2 n = ( 0.50 × 0.50 ) (2.58 / 0.06 ) 2 n = 461 sample size My Analysis...
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MATH_221_MORE_MODULE_6_HINTS_SU_10 - My Known Values E =...

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