The average daily volume of a computer stock in 2011 was μ=35.1million shares, according to a reliable source. A stock analyst believes that the stock volume in 2014 is different from the 2011 level. Based on a random sample of 30 trading days in 2014, he finds the sample mean to be 26.3 million shares, with a standard deviation of s=12.3 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below.
The average daily volume of a computer stock in 2011 was μ=35.1million shares, according to a reliable source. A stock analyst believes that the stock volume in 2014 is different from the 2011 level. Based on a random sample of 30 trading days in 2014, he finds the sample mean to be 26.3 million shares, with a standard deviation of s=12.3 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below.
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The average daily volume of a computer stock in 2011 was μ=35.1million shares, according to a reliable source. A stock analyst believes that the stock volume in 2014 is different from the 2011 level. Based on a random sample of 30 trading days in 2014, he finds the sample mean to be 26.3 million shares, with a standard deviation of s=12.3 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below.
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
2014 is different from the 2011 level. Based on a random sample of 30 trading days in 2014, he finds the sample mean to be 26.3 million shares, with a standard
deviation of s = 12.3 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
H,:
# 35.1 million shares
(b) Construct a 95% confidence interval about the sample mean of stocks traded in 2014.
The lower bound is
million shares.
The upper bound is
million shares.
(Round to three decimal places as needed.)
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