A random sample of n = 4 scores is obtained from a normal population with m = 30 and s = 8. what is the probability that the sam
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Hi
-1 = X
Let's square the whole thing
so we have : x+7 +1 = x²
x² +x+7 +1 = 0
x²+x+8 = 0
no easy way to see a common factor so, let 's resolve by using discriminate.
Δ = 1-4*1*8
Δ = 1 -32
Δ = -31
as Δ ≤ 0 , there is no Real answer to your equation
however , if you need we can find imaginary solutions. Just ask in commentaries