Statistics
posted by Jen on .
A sample of purchases at the local convenience store has resulted in the following sample data, where x = the number of items purchased per customer and f = the number of customers.
x 1 2 3 4 5
f 5 15 8 8 7
•What does the 15 stand for in the above table?
•Find the midrange of items purchased.
•How many items were purchased by the customers in this sample?

The 15 indicates that 15 customers each bought 2 items = subtotal of 30 items bought.
That should help you with the other questions. 
So the midrange of items purchases would be 3.
5+30+24+32+35 = 126 items were purchased by the customers in this sample.
Did i do this correctly?