7. Test

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 32 9 million shares, with a standard deviation of s = 14 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 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 |million shares and 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. Reject the null hypothesis because u = 35 1 million shares falls in the confidence interval. O C. Do not reject the null hypothesis because p = 35.1 million shares falls in the confidence interval. O D. Do not reject the null hypothesis because u = 35.1 million shares does not fall in the confidence interval. Click to select your answer(s)