A random sample of 10 subjects have weights with a standard deviation of 11.3993 kg. What is the variance of their weights? Be sure to include the appropriate units with the result. The variance of the sample data is V (Round to four decimal places as needed.)Identify the symbols used for each of the following: (a) sample standard deviation; (b) population standard deviation; (c) sample variance; (d) population variance. a. The symbol for sample standard deviation is b. The symbol for population standard deviation is c. The symbol for sample variance is d. The symbol for population variance isA study is published with information about ages of people in a particular region. A sample of five residents from the region have the following ages, in years. Complete parts (a) through (d) below. 24 40 82 4 64 a. Determine the range of these ages. The range is 78 (Simplify your answer.) E ( x, - x ) 2 b. Find the sample standard deviation of these ages by using the defining formula s = n- 1 , where n is the sample size and x is the sample mean. The standard deviation is. (Round to one decimal place as needed.)