Answer:


Step-by-step explanation:
Given

Required
Evaluate

Separate each factor with multiplication sign

Express 8 as 4 * 2 and
as 

Split each factor

Evaluate 

Apply law of indices:


Reorder





Hence:


In simple regression analysis, the standard error is never greater than the standard deviation of y values.
Answer:
Step-by-step explanation:
(a)



(b)


