The average daily volume of a computer stock in 2011 was u = 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 40 trading days in 2018, he finds the sample mean to be 27.6 million shares, with a standard deviation of s = 12.2 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: V35.1 million shares H,: V35.1 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 three decimal places as needed.) (c) Will the researcher reject the null hypothesis? O A. Reject the null hypothesis because u= 35.1 million shares does not fall in the confidence interval. O B. Do not reject the null hypothesis becauseu= 35.1 million shares falls in the confidence interval. OC. Reject the null hypothesis because u = 35.1 million shares falls in the confidence interval. O D. Do not reject the null hypothesis becauseu= 35.1 million shares does not fall in the confidence interval.
The average daily volume of a computer stock in 2011 was u = 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 40 trading days in 2018, he finds the sample mean to be 27.6 million shares, with a standard deviation of s = 12.2 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: V35.1 million shares H,: V35.1 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 three decimal places as needed.) (c) Will the researcher reject the null hypothesis? O A. Reject the null hypothesis because u= 35.1 million shares does not fall in the confidence interval. O B. Do not reject the null hypothesis becauseu= 35.1 million shares falls in the confidence interval. OC. Reject the null hypothesis because u = 35.1 million shares falls in the confidence interval. O D. Do not reject the null hypothesis becauseu= 35.1 million shares does not fall in the confidence interval.
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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Transcribed Image Text:The average daily volume of a computer stock in 2011 was u = 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 40 trading
days in 2018, he finds the sample mean to be 27.6 million shares, with a standard deviation of s = 12.2 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:
V35.1 million shares
H,:
V35.1 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
(Round to three decimal places as needed.)
million shares and
million shares.
(c) Will the researcher reject the null hypothesis?
A. Reject the null hypothesis because u = 35.1 million shares does not fall in the confidence interval.
O B. Do not reject the null hypothesis because u = 35.1 million shares falls in the confidence interval.
OC. Reject the null hypothesis because u = 35.1 million shares falls in the confidence interval.
O D. Do not reject the null hypothesis because u = 35.1 million shares does not fall in the confidence interval.
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