Question

i dont understand how to find this practice problems answer?

We want to know how many people plan on buying a new car this year. Determine the sample size needed for a one proportion confidence interval to estimate this with a margin of error of 0.07 and a 95% confidence interval. We don't have any idea what the population proportion would be.

Answer 1

Answer:-

Here student remembered that when we don't have idea what the population proportion would be and we have only margin of error and level of significance then we should take proportion p as 0.5 , otherwise we can't go for further calculation.

HE : 0.07 0 05 ME : Za2 P9 0-07: |-96 6.07 1.96 %3D (o.07)2 (1.96)² 29 %3D (1.96) (0.07)2 Hede we dhould take In 3uch condition we take p=o:5 Motethat Imp (1.96)2 Co.07)2 X Co.s) Co. s) = n= 196

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