help with solutions 8. (a) In a survey conducted by a mail order company a random sample of 200 customersyielded 172 who indicated that they were highly satisfied with the delivery time oftheir orders. Calculate an approximate 95% confidence interval for the proportionof the company's customers who are highly satisfied with delivery times.(b) A random sample of size 49 from a normal distribution gives a 99% confidence in-terval for the population mean as (30, 50).Find a 90% confidence interval for the population mean based on this information.

a)Givenn=200x=172p^=xn=172200=0.86Confidence interval= 95%

Answered: (a) In a survey conducted by a mail…

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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