Problem
The average daily volume of a computer stock in 2011 was $\mu=35.1$ 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 29.8 million shares, with a standard deviation of $s=15.1$ million shares. Test the hypotheses by constructing a $95 \%$ confidence interval. Complete parts (a) through (c) below (a) State the hypotheses for the test.
Solution
Step 1 ：State the null hypothesis, \(H_0: \mu = 35.1\)
Step 2 ：State the alternative hypothesis, \(H_1: \mu \neq 35.1\)
Step 3 ：The final answer is: \(\boxed{H_0: \mu = 35.1, H_1: \mu \neq 35.1}\)
