Exercise 4 in Module 5 required you to find the median number of contacts made by 20 autistic children. Here are those data again.
No. of Contacts No. of Children (Frequency)
8................................... 1
6................................... 1
5................................... 1
4................................... 2
3................................... 4
2................................... 7
1................................... 4
Find the (a) range, (b) variance, and (c) standard deviation for number of contacts. NOTE: Don't forget to enter each score the number of times indicated by its frequency!