What is the minimal sample size needed for a 95% confidence interval to have a maximal...

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What is the minimal sample size needed for a 95% confidenceinterval to have a maximal margin of error of 0.1 in the followingscenarios? (Round your answers up the nearest whole number.)
(a) a preliminary estimate for p is 0.31
(b) there is no preliminary estimate for p
For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.
A random sample of medical files is used to estimate theproportion p of all people who have blood type B.
If you have no preliminary estimate for p, how manymedical files should you include in a random sample in order to be85% sure that the point estimate pÌ‚ will be within adistance of 0.06 from p? (Round your answer up to thenearest whole number.)
medical files
Answer part (a) if you use the preliminary estimate that about12 out of 90 people have blood type B.
_medical files

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SolutionWhat is the minimal sample size needed for a 95 confidenceinterval to have a maximal margin of error of 01 in the followingscenarios Round your answers up the nearest whole numbera a preliminary estimate for p is See Answer

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