Answer:
Step-by-step explanation:
For a standard normal distribution of mean 
and 
the statistic 
In this problem we look for the value of X that is 2 standard deviations above the mean.
If there are two standard deviations above the mean, then, in the standard normal distribution, the statistic 
.
Then, we clear X.
Where:
8*4=32
4*4/2=8
8-3-2=3
3*4/2=6
32+8+6=46
For this case we have the following system of two equations with two unknowns:
Adding both equations we have to eliminate the variable "x":
Adding common terms, keeping in mind that different signs are subtracted and the sign of the major is placed:
Answer:
Option A
Yes 1 -5 then tou add 1 +5
