To analyze the risk, or volatility, associated with investing in General Electric common stock, consider a sample of the eight quarterly percent total returns. The percent total return includes the...

Extracted text: To analyze the risk, or volatility, associated with investing in General Electric common stock, consider a sample of the eight quarterly percent total returns. The percent total return includes the stock price change plus the dividend payment for the quarter. Excel File: data11-06.xlsx 20.0 -20,5 12.2 12.6 10.5 -5.8 -18.7 15.3 a. What is the value of the sample mean (to 1 decimal)? What is its interpretation? This is the estimate of the Select your answer v mean percent total return per quarter for General Electric. b. Compute the sample variance and sample standard deviation as measures of volatility for the quarterly return for General Electric (to 2 decimals). Variance: Standard deviation: c. Construct a 95% confidence interval for the population variance (to 2 decimals). Use Table 11.1. d. Construct a 95% confidence interval for the population standard deviation (to 2 decimals). Use Table 11.1.