C I guess sorry if I get you a low score
The answer will be b I am sure
Answer:
The right answer is "516.3978".
Step-by-step explanation:
Given:
Sample mean,
Standard deviation,
Random sample,
We can say that, the sample mean will be equivalent to the population mean.
So,
⇒
hence,
The standard deviation will be:
⇒ =
First question answer is B.
Second question answer is D.
3^2 = 9, 7 x 9 =63
**In case you're wondering why 3 square root 7 equals to square root 63.
Hope this helps.
The MAD is 10.425
Find the sum of all values, then divide by the values.
Hope this helps :)