Question

Solve and explain each?

Answer 1

Sum = 4(2) + 5(1) + 6(2) + 7(0) + 8(2) + 9(1)

= 8 + 5 + 12 + 0 + 16 + 9

= 50

Mean = Sum/Frequency

= 50/8

= 6.25 rings

Answer 2

• Sum: 50
• Mean: 6.25

Explanation:

You want the Sum and Mean of the number of rings as listed in the given table.

Frequency

The "frequency" line tells you the number of times the value above is included in the list. The expanded list of number of rings, taking frequency into account, is ...

{4, 4, 5, 6, 6, 8, 8, 9}

The sum of these numbers is 50.

The average of these 8 numbers is 50/8 = 6.25.

• Sum: 50
• Mean: 6.25

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