The following data values represent a sample. What is the variance of the sample? X = 9. Use the information in the table to help you.
х
13
9
11
7
di
(x; - x)2
16
0
4
4
16
A. 8
O Ο Ο
B. 4.5
C. 3.8
D. 10

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

10 - 75

step-by-step explanation:

there's nothing attached so it's most likely anything in that range.

look at the picture i have filled out a table for it. hope this .