(a) Construct a90%confldence interval forσ2if the sample size,n, is 20 . The lower bound is (Round to two decimal places as needed) The upper bound is (Round io two decimal places as needed.) (b) Construct a90%confidence interval forσ2the sample site,n, is 30 . The lower bound is (Round to two decimal places as needed.) The upper bound is - (Round to hwo decimal places as needed.) How does inereasing the sample sire aflect the widh of the interval? The width increases The width dotes not change The width decreases (c) Construct a98%confidence interval ford2if the sample sue,n, is 20 The lower bound is (Round to two decimat places as needed) ↑A simple random sample of size n is drawn from a population that is known to be normally distributed. The sample variance, s, is determined to be 13.1. Complete parts (a) through (c).(a) Construct a 90% confidence interval for a² if the sample size, n, is 20.The lower bound is 8.26 (Round to two decimal places as needed.)The upper bound is 24.60 (Round to two decimal places as needed.)(b) Construct a 90% confidence interval for a² if the sample size, n, is 30.The lower bound is 8.93 (Round to two decimal places as needed.)The upper bound is 21.45 (Round to two decimal places as needed.)How does increasing the sample size affect the width of the interval?The width increasesThe width does not changeThe width decreases(c) Construct a 98 % confidence interval for e² if the sample size, n, is 20The lower bound is (Round to two decimal places as needed)eme

Answered: A simple random sample of size n is…

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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(a) Construct a90%confldence interval forσ2if the sample size,n, is 20 . The lower bound is (Round to two decimal places as needed) The upper bound is (Round io two decimal places as needed.) (b) Construct a90%confidence interval forσ2the sample site,n, is 30 . The lower bound is (Round to two decimal places as needed.) The upper bound is - (Round to hwo decimal places as needed.) How does inereasing the sample sire aflect the widh of the interval? The width increases The width dotes not change The width decreases (c) Construct a98%confidence interval ford2if the sample sue,n, is 20 The lower bound is (Round to two decimat places as needed)