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 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. Họ: H 35.1 million shares H4: * 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 between 22.134 million shares and 32.066 million shares. (Round to 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 because u= 35.1 million shares falls in the confidence interval. OC. Do not reject the null hypothesis because u= 35.1 million shares does not fall in the confidence interval. O D. Reject the null hypothesis because u= 35.1 million shares falls 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 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. Họ: H 35.1 million shares H4: * 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 between 22.134 million shares and 32.066 million shares. (Round to 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 because u= 35.1 million shares falls in the confidence interval. OC. Do not reject the null hypothesis because u= 35.1 million shares does not fall in the confidence interval. O D. Reject the null hypothesis because u= 35.1 million shares falls 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 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
+ 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 22.134 million shares and 32.066 million shares.
(Round to 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.
B. Do not reject the null hypothesis because u = 35.1 million shares falls in the confidence interval.
C. Do not reject the null hypothesis because µ = 35.1 million shares does not fall in the confidence interval.
D. Reject the null hypothesis because u = 35.1 million shares falls in the confidence interval.
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