Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 2 percentage points and use a confidence level of 95%. Complete parts (a)and (b) below.a. Assume that p and q are unknown.рn=(Round up to the nearest integer.)b. Assume that 21% of adults can wiggle their ears.n=(Round up to the nearest integer.)

Answered: Find the sample size needed to 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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Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones assume that you want 99% confidence that your area is no more than 0.045
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I collect a random sample of size n from a population and from the data collected compute a 90% confidence interval for the mean of the population. Which of the following would produce a wider confidence interval, based on these same data? Use a larger confidence level. Use a smaller confidence level. a b.
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How do I do this on a ti84 plus? Disregard the writing on the paper.
Use the confidence interval to find the margin of error and the sample mean. (1.62,1.90) The margin of error is (Round to two decimal places as needed.) The sample mean is
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