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Question 9

Question 9

MATLAB: An Introduction with Applications
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 9

The average daily volume of a computer stock in 2011 was µ = 35.1 million shares, according to a reliable source. A stock analyst believes that the stock volume in 2018 is different from the 2011 level. Based on a random sample of 30 trading days in 2018, he finds the sample mean to be 27.1 million shares, with a standard deviation of s = 13.3 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below. ..... (a) State the hypotheses for the test. Ho: H = 35.1 million shares H1: + 35.1 million shares (b) Construct a 95% confidence interval about the sample mean of stocks traded in 2018. With 95% confidence, the mean stock volume in 2018 is between million shares and million shares. (Round to three decimal places as needed.)
Transcribed Image Text:The average daily volume of a computer stock in 2011 was µ = 35.1 million shares, according to a reliable source. A stock analyst believes that the stock volume in 2018 is different from the 2011 level. Based on a random sample of 30 trading days in 2018, he finds the sample mean to be 27.1 million shares, with a standard deviation of s = 13.3 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below. ..... (a) State the hypotheses for the test. Ho: H = 35.1 million shares H1: + 35.1 million shares (b) Construct a 95% confidence interval about the sample mean of stocks traded in 2018. With 95% confidence, the mean stock volume in 2018 is between million shares and million shares. (Round to three decimal places as needed.)
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