Answer:
Step-by-step explanation:
Given that IQ mean is 100 and std dev = 12 for normal adults

Std error = 

i.e. sample size should be atleast 97
The required sample size is 97.
This is reasonable as this is greater than 30
Yes. This number of IQ test scores is a fairly large number.
Answer:
that is the solution to the question
Are you trying to write an equation?
y-8=2(x-3)
y=2x-6+8
y=2x+2
\left[x _{2}\right] = \left[ 6+\sqrt{33}\right][x2]=[6+√33]