The line plots below show the numbers of hours for the 12 students in each class. Find the mean absolute deviation (MAD) for each class.

hope this helps............

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:

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2