Construct a 98% confidence interval to estimate the population mean when x= 131 and s 34 for the sample sizes below.a) n= 40Click here to view page 1 of the critical t-score table.Click here to view page 2 of the critical t-score table.%3Db) n= 70 c) n= 80a) The 98% confidence interval for the population mean when n= 40 is from a lower limit of to an upper limit of-(Round to two decimal places as needed.)

Given that x̄=131 , s=34 a) n=40 , b) n=70 , c) n=80

Answered: 34 for the sample sizes below. -) n= 40…

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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From a large number of actuarial exam scores, a random sample of 275 scores is selected, and it is found that 187 of these 275 are passing scores. Based on this sample, find a 90% confidence interval for the proportion of all scores that are passing. Then find the lower limit and upper limit of the 90% confidence interval.
We want to estimate the proportion of individuals in a population who are in favor of a certain bill with a margin of error of at most 0.015. a. What is the minimum sample size needed to satisfy this requirement, with 90% confidence? Consider in your calculations that there is no knowledge about the proportion of individuals in favor of the bill. b. What is the minimum sample size needed to satisfy this requirement, with a confidence of 90%, using the additional information that the proportion must be at most equal to 0.15?
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