Answer:
0.34134
Step-by-step explanation:
in other to solve for this question we would be using the z score formula
z = (x - μ) / σ
x = raw score
μ = mean
σ = standard deviation
the question tells us to find the probability that a worker selected at random makes between $350 and $400
let x1 = 350 and x2= 400 with the mean μ = 400 and standard deviation σ = $50.
z1 = (x1 - μ) / σ = (350-400) / 50 = -1
z2 = (x2 - μ) / σ = (400 - 400) / 50 = (0/50) = 0
from tables, P(z <= -1) = 0.15866
P(z <= 0) = 0.5
then the probability would give us, P(-1 ≤ z ≤ 0) =0.5 - 0.15866 =
0.34134
that explains that the probability that a worker selected at random makes between $350 and $400 = 0.34134
Answer:
20% as a fraction is 20/100
20% as a decimal is 0.20
Step-by-step explanation:
So it’s definitely not the first two options as you can see from comparing the graph I’ve attached.. But the graph I’ve attached should match up to one of the two other options you have that I cannot see, I’m sorry! I would tell if it was C or D. Unless you can attach another photo showing me the options.