The average daily volume of a computer stock in 2011 was = 35.1 million shares, according

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Question:

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 30.9 million shares, with a standard deviation of s =11.8 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: µ = 35.1 million shares

H1: µ ≠ 35.1 million shares

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

(____million shares, ____ million shares) (Use ascending order. Round to three decimal places as needed.)