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statistics

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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=8, 20, 8, 8, 7

What does the 20 stand for in the above table?
Find the midrange of items purchased.
How many items were purchased by the customers in this sample?
Please show work!

  • statistics - ,

    20 people bought 2 items each.

    Midrange looks like 3 for x.

    ∑(f*x) = (8*1) + (2*20) +…. = ?

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