What are the missing numbers ?, 3.2, 2.4, ?, 0.8
2 answers:
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Answer:
{x|x ∈ R, x < - 12 }
Step-by-step explanation:
given - x > 6
multiply both sides by - 2
Remembering to reverse the inequality symbol as a consequence of multiplying by a negative value
x < - 12 ← reverse symbol
{ x | x ∈ R, x < - 12 } ← solution set
Answer:
Step-by-step explanation:
This is the problem we need to solve:
and we have everything but the z-score (which we find from a table) with our main unknown being the standard deviation.
If the probability that a random variable that is less than 11 is .67, we first have to find the z-score from the table that is closest to .67, and there are 2:
P(z < .43) = .66640 and P(z < .44) = .67003
We'll use z = .44
and
and
so
σ = 2.27 (check it; it works!)