Question
The average daily volume of a computer stock in 2011 was =35.1 million shares, according to a reliable source. A stock analyst believes that the
The average daily volume of a computer stock in 2011 was =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 25.8 million shares, with a standard deviation of s=12.9 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below.
(b) Construct a 95% confidence interval about the sample mean of stocks traded in 2014.
The lower bound
The upper bound
) Will the researcher reject the null hypothesis?
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A First Course in Differential Equations with Modeling Applications
Authors: Dennis G. Zill
10th edition
978-1111827052
