A random sample of medical files is used to estimate the proportionp of all people who have blood type B. a. If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 85% sure that the point estimate p will be within a distance of 0.05 from p?

A random sample of medical files is used to estimate the proportionp of all people who have blood type B. a. If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 85% sure that the point estimate p will be within a distance of 0.05 from p?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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I need the answers step by step

3. A random sample of medical files is used to estimate the proportion p of all people who have
blood type B.
a. If you have no preliminary estimate for p, how many medical files should you include in a
random sample in order to be 85% sure that the point estimate p will be within a distance
of 0.05 from p?
b. Answer part (a) if you use the preliminary estimate that about 8 out of 90 people have
blood type B.
&
4.
7
8

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