2,231.5 milligrams = ? Grams A) 2.2315 g B) 223.15 g C) 22,315 g D) 0.0022315 g
2 answers:
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Answer:
the probability that the average loss from fire in the sample is no greater than $275 is 0.9938
Step-by-step explanation:
given information:
mean, μ = $250
std deviation, σ = $1000
random sample, n = 10000
x = $275
P( ∠_ 275) = P(z < (z ∠ (x - μ)/(σ/√n))
= P (z ∠ (275 - 250)/(1000/√10000)
= P(z ∠ 2.5)
= 0.9938