Need help with statistics.

Consider the following frequency distribution. Class Frequency 2 up to 4 2 4 up to 6 6 6 up to 8 8 8 up to 10 2 l a. Calculate the population mean. (Round your answer to 2 decimal places.) population mean _ b. Calculate the sample mean c. Calculate the population variance and the population standard deviation. (Let Excel hold all the decimal place for intermediate calculations and give nal answers to 2 decimal places.) Population variance Population standard deviation d. Calculate the sample variance and the sample standard deviation. (Let Excel hold all the decimal place for intermediate calculations and give final answers to 2 decimal places.) Sample variance Sample standard deviation