Alignment Number Styles ther silicon chip sales are independent of where the XYZ country's economy is in the business cycle, data have been collecte K L. M 153 92 178 95 Q4 A sample of 87...

attempt Q4

Extracted text: Alignment Number Styles ther silicon chip sales are independent of where the XYZ country's economy is in the business cycle, data have been collecte K L. M 153 92 178 95 Q4 A sample of 87 wealth-market mutual funds was chosen on February 1, 2016, and the average annual rate of return over the past 30 days was found to be 3.78 percent, and the sample standard deviation was 0.565 percent. A year earlier, a sample of 93 wealth-market funds showed an average rate of return of 4.91 percent, and the sample standard deviation was 1.39 percent. Is it reasonable to conclude (at a=0.01) that wealth-market interest rates declined during 2015? A tire manufacturer warranties its tires to last at least Q5 20275 miles or "you get a new set of tires In its experience, a set of these tires lasts on average 26275 miles with standard deviation Assume that the wear is normally distributed. The manufacturer profits Rs. 20 on each set sold, and