Consider the following sample data: 38 41 30 48 36 40 a. Calculate the range. Answer is complete and correct. Range 18 b. Calculate MAD. (Round your intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) x Answer is complete but not entirely correct. MAD 25.00 x c. Calculate the sample variance. (Round your intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Sample variance d. Calculate the sample standard deviation. (Round your intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Sample standard deviation