What is the mean absolute deviation of data sets A and B?
A {25, 19, 20, 15, 17, 18}
B {20, 7, 8, 10, 21, 18}

A)2.3333 B)5.6667

Step-by-step explanation:

A)

First find the mean of the

(25 + 19 + 20 + 15 + 17 + 18)/6  = 114/6

mean = 19

Then  subtract the mean from each number and find the mean of that

MAD =  (25 - 19) + ( 19 - 19) + ( 20 - 19) + ( 15 - 19) + ( 17 - 19) + ( 18 - 19) /6  = (6) +(0) + (1) + (4) + (2) + (1) /6  =  14 /6  = 2.3333

Mean Absolute Deviation = 2.3333

B)

First find the mean

(20 + 7 + 8 + 10 + 21 + 18)/6  = 84/6

mean = 14

Then  subtract the mean from each number and find the mean of that

MAD =  (20 - 14) + ( 7 - 14) + ( 8 - 14) + ( 10 - 14) + ( 21 - 14) + ( 18 - 14)/ 6 =  (6) + (7) + (6) + (4) + (7) + (4) /6  =  34 /6  = 5.6667

Mean Absolute Deviation = 5.6667

idk

step-by-step explanation:

maybe try   if it is work from a book, if not try

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.