You may need to use the appropriate appendix table or technology to answer this question. To analyze the risk, or volatily, associated with livesting in a certain common stock, consider a sample of the elght quarterly persent total returns. The percent tocal return indudes the stock price change plus the divldend payment for the quarter: (a) What is the value of the sample mean (as a percent)? What is its interpretation? The value is x%, which is the estimate of the 6 mean percent total return per quarter for this stock. (b) Compute the sample variance and sample standard deviabon (as a percent) as meawures of volat aty for the quarterty retum for this stock: (hicund your aniwers to two ftecimal places.) variancestandarddeviationXX% (c) Construct a 95% confidence interval for the population vartance, (Round your answers to tho decimal places.) to (d) Construct a 95% confidence thterval for the populapion standaed oevation (as a percent). (Hound pour answers ta two oecimal places.) the to