2. I'm pretty picky about my bedsheets. I really like a high thread count because it feels smoother. However, I've recently started wondering whether my favorite sheet company, Sheets'R'Us has been...

Extracted text: 2. I'm pretty picky about my bedsheets. I really like a high thread count because it feels smoother. However, I've recently started wondering whether my favorite sheet company, Sheets'R'Us has been lying about their thread counts. I counted the threads of the 16 sheets I own from their company. The mean thread count was 970. According to their website, Sheets R'Us's sheets should have a mean thread count of about 1000 with a standard deviation of 40 threads, so sometimes they have more and sometimes they have less than 1000. With an alpha level of a = .05, test whether my 16 sheets are low compared to the stated thread counts on the company website. a. Write out your null and alternative hypotheses using the correct symbols. b. Calculate the standard error of the mean from the information given. Be sure to write out the formula.