Answer: 0.3974
Step-by-step explanation:
Given : The distribution of annual returns on common stocks is roughly symmetric, so the mean return over even a moderate number of years is close to Normal.
Real annual returns on U.S. common stocks had mean :
Standard deviation :
We assume that the past pattern of variation continues.
Let x be the random variable that represents the annual returns on common stocks over the next 32 years .
The formula for z-score :
For x= 0.14,
By using the standard normal distribution table , we have
The probability that the mean annual return on common stocks over the next 32 years will exceed 14% :-
Rewrite it in y=mx+b form.
So 8x-2y=5
-2y=-8x+5
y=4x-5/2
So the slope is m or 4.
The y intercept is b or -5/2.
Answer:
Because you multiplied two same things. So it removes the square root and then just add the coefficients.
"a "and "b^2-4ac" must be negetive