A recent survey of students at a local school revealed that on average, girls tend to have hair that is 10 inches long. After compiling all the data, statisticians
learned that the standard deviation was 3 inches. What hair length goes with a z-
score of 2? *

Answer Choices

4 inches
6 inches
10 inches
12 inches
13 inches
15 inches
16 inches

answer: 1 2 3 6

step-by-step explanation:

1x6=6 2x3=6

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.