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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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 16% of the time. Using this (national) estimate for p, answer part (a). (Round your answer up to the nearest whole number.) __________ phone calls
You interview 100 college sophomores , and you ask how much they earned the previous summer. You decide to use the median to describe the center of the distribution or earnings. You should describe the pread of the distribution by A)95% confidence B) The margin of error C) the stadard deviation D) The range between the first and thrid quartiles.
Use the side-by-side boxplots shown to complete parts (a) through (e). VIN (a) What is the median of variable x? The median of variable x is (Round to the nearest integer as needed.) (b) What is the third quartile of variable y? The third quartile of variable y is (Roind to the nearest integer as needed.) (c) Which variable has more dispersion? Why? O A. Variable x-the range of variable y is smaller than that of variable x OB. Variable y-the interquartile range of variable y is larger than that of variable x. Staterunch
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 95% confident that you esimate is within 1% of the true population proportion. How large of a sample size is required? Do not round mid-calculation.
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 87%. You would like to be 98% confident that your estimate is within 1% of the true population proportion. How large of a sample size is required?
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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What percent of our campus is female? The Statistical Abstract of the United States, 112th edition, indicates that approximately 54% of college students are female. Now, how large a sample do we now need to be 99% sure that the error will be no more than 0.03 from? 1838 students 1849 Students 1834 Students 1853 Students
Solve it correctly please. I will rate accordingly.
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n = 992 and x = 581 who said "yes." Use a 99% confidence level. Click the icon to view a table of z scores. ..... a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E = (Round to three decimal places as needed.) c) Construct the confidence interval.

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