The line plots below show the numbers of hours for the 12 students in each class. The distance between the means of Class A and Class B is 4 hours.
Find the mean absolute deviation (MAD) for each class.

Step-by-step explanation:

we are given some data 3,4,5,5,5,5,5,5,5,5,6,7

we want to figure out the MAD (Mean absolute deviation) of the given database

remember that,

where m(X) represents the mean of the given database and tells us to subtract every data with the got mean and n represents the number of data

let figure out m(X)

simplify multiplication:

simplify addition:

simplify substraction:

let's figure out and

last part let's figure out MAD

simplify division:

likewise class-2

given database 7,8,9,9,9,9,9,9,9,9,10,11

figure out m(X)

simplify multiplication:

simplify addition:

simplify division:

likewise

figure out and

figure out MAD

simplify division:

i think c. but don't trust it.

step-by-step explanation:

c

step-by-step explanation: