In the dataset below1.15 0.33 0.40 0.33 1.35 0.38 0.25 0.40 0.35(a) Skewness in the stemplot of this data affects the appropriateness of procedures.using the t-distribution.Give two 95% confidence intervals, for the population mean, one with the outliersand one without, if any exist, using t-procedures.(b) How did the removal of outliers effect the confidence interval length, critical t-value and sample standard deviation?

Answered: Image /qna-images/answer/b7c64cf1-373e-46f0-bd93-2d6973fcd6fd.jpg

Answered: In the dataset below 1.15 0.33 0.40…

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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Why do we use a t-distribution to compute confidence intervals for population means?
10.
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QUESTION 1 a) Two machines are used to fill glass bottles with a net volume of 13.0ml. The filling processes are assumed to be normally distributed, with common but unknown standard deviations. The quality department suspects that both machines fill to the same net volume, whether or not this volume is 13.0ml. An experiment is performed by taking a random sample from the output of each machine. 13.01 12.98 13.02 13.05 12.99 Machine 1 13.03 13.01 12.96 12.97 13.04 13.04 13.02 13.01 13.05 13.02 Machine 2 13.00 12.96 12.99 13.02 13.03
Suppose that you are interested in the number of people in each household in the U.S. Your sample includes 10 households, with a mean 2.5 and a standard deviation 1.2. Construct a 95% confidence interval (CI) of the mean number of household members. (A) 1.2-3.8 (B) 1.4-3.6 (C)1.6-3.4 (D) 1.7-3.3 (E) 1.8-3.2
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