Mean, Median, & MAD

Notes Packet
Pages 6 and 7

measure

of

center

average

sum

divide

middle

median

The median best represents a typical rating
because the mean value is affected by the

few low ratings.

The mean and median ratings are very

close together. This tells us that the data is

symmetrical.

Sergio should buy Sound Byte headphones
because the mean and median ratings are

both higher than Tunez.

spread out

deviates

deviation

0

mean

absolute

value

average

The mean number of minutes for Bush HS

is higher than Regal HS. On average, it

takes Bush HS longer to complete a set

of problems.

The MAD for Bush HS is about twice the
MAD of Regal HS. Regal HS students were
more consistent in the time it took them to

answer a set of problems.

I agree that the mean will increase, but the

mean absolute deviation will decrease

because the data will be less spread out

once the value of 2.9 m is removed.

Mean, Median, & MAD

Mini Task