Answer:

Step-by-step explanation:

Answer:
I think the answer is (8, 120)
The fourth number would be 105 like 98% sure
Answer:
The standard deviation will be: 2.1
Step-by-step explanation:
We know that standard deviation is basically the square root of variance.
Using the formula to calculate the standard deviation

As
so the standard deviation can be calculated as:
standard deviation 


Therefore, the standard deviation will be: 2.1