Mathematics, 07.06.2020 03:00 mariakelley15

# 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 40 trading days in 2014, he finds the sample mean to be 25,1 million shares, with a standard deviation of s = 12 4 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below.
a. State the hypotheses for the test.

b. Construct a 95% confidence interval about the sample mean of stocks traded in 2014

c. Will the researcher reject the null hypothesis?

A. Do not reject the null hypothesis because μ= 35 1 million shares falls in the confidence interval.

B. Reject the null hypothesis because μ= 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 μ= 35 1 million shares does not fall in the confidence interval.

Answers: 2

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