For a sample 1000 app users, the research team reports an average age of 39. If the population standard deviation is 9.5 years, what would be the upper bound for a 90% confidence interval estimate of the mean age of all users?

For a sample 1000 app users, the research team reports an average age of 39. If the population standard deviation is 9.5 years, what would be the upper bound for a 90% confidence interval estimate of the mean age of all users?

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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Question

Definition Definition Method in statistics by which an observation’s uncertainty can be quantified. The main use of interval estimating is for describing a range that is made by transforming a point estimate by determining the range of values, or interval within which the population parameter is likely to fall. This range helps in measuring its precision.

Expert Solution

Step 1

given data

n = 1000

$\bar{x} = 39 σ = 9.5 90 % c i, u p p e r b o u n d o f c i = ?$

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