# Mean

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##### Intros

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##### Examples

###### Lessons

- Calculate the mean of each set of data. Round your answer to the nearest tenth.
- A survey collected information about the total amount of time teens spent on computers each week. Only data from four cities is listed below.

Cities

Computer time (hours per week)

A

15.3

B

17.5

C

12.4

D

13.9

- Harry was given the following marks on his English essays:

69%, 71%, 85%, 80%, 93%, 99%- Calculate his mean mark? Round your answer to the nearest whole percent.
- What mark would he need to receive on the next essay to increase his mean by 2 percent for the seven essays?
- Harry's friend, Thomas, received the following marks on his English essays:

96%, 74%, 75%, 66%, 96%, 90%

What is Thomas's mean mark? Round your answer to the nearest whole percent. - Who has a smaller mean absolute deviation? Harry or Thomas? What does this tell you?

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