Suppose a population consists of four elements, a, b, c, and d. the value of each element is as follows. population element a b c d value 15,000 22,000 25,000 40,000 to examine the confidence interval of the population mean, you select a random sample of size two. suppose you happen to select (c, d) as your sample. calculate the 95% confidence interval.

people grow faster than other people.

step-by-step explanation:

should you really be posting this isn't math boi.

the answer is d

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

b. b < 1 might be the correct answer