For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.A random sample of medical files is used to estimate the proportion p of all people who have blood type B.n USE SALT(a) If you have no preliminary estimate for p, how many medical files should you include in a random sample in order tobe 85% sure that the point estimate p will be within a distance of 0.07 from p? (Round your answer up to the nearestwhole number.)medical files(b) Answer part (a) if you use the preliminary estimate that about 13 out of 90 people have blood type B.medical files

For the given probleme, we need ro find the minimum number of sample size in order to be 85% sure…

Answered: (a) If you have no preliminary estimate…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Smart phone: Among 245 cell phone owners aged 18-24 surveyed, 106 said their phone was an Android phone.
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For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.How hard is it to reach a businessperson by phone? Let p be the proportion of calls to businesspeople for which the caller reaches the person being called on the first try. (a) If you have no preliminary estimate for p, how many business phone calls should you include in a random sample to be 80% sure that the point estimate p̂ will be within a distance of 0.03 from p? (Round your answer up to the nearest whole number.)phone calls(b) A report states that businesspeople can be reached by a single phone call approximately 15% of the time. Using this (national) estimate for p, answer part (a). (Round your answer up to the nearest whole number.)phone calls
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