8. Give an example of each of the following sampling techniques and list an advantage of using each type. a) stratified sample b) simple random sample c) systematic sample 9. In the fairy tale Rumplestiltskin, the queen must guess the name Rumplestiltskin. a) If she knows only what letters are in the name, how many different guesses could she make? b) At one guess per minute, how long would it take to try all the possible arrangements? 10. A survey asked randomly chosen movie fans how many videos they rented in the last month. Number of Videos Frequency 17 24 21 12-13 a) Estimate the mean and median number of videos rented by those surveyed. b) Draw a histogram and relative frequency polygon for the data. c) Discuss any sources of inaccuracy in your calculations