Answer:
1.5
Step-by-step explanation:
The mean is the Middle number.
1 standard deviation in both sides of 7.5 makes it between 6 and 9.
<u>What is the </u><u>"common difference"</u><u> in 6 to 7.5 and from 7.5 to 9?</u>
![7.5-6=1.5](https://tex.z-dn.net/?f=7.5-6%3D1.5)
and
![9-7.5=1.5](https://tex.z-dn.net/?f=9-7.5%3D1.5)
So, we would say the standard deviation is 1.5
Answer choice A is right.
Answer:
x=
2/7
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
7/3x 3/7=2/3(3/7)
so 2/7
Answer:
12% of 60, 400% of 18, 55% of 220
Step-by-step explanation:
12% of 60 =7.2
55% of 220 = 121
400% of 18 = 72
7.2, 72, 121