The mean household income for a certain state is $70,000 with a standard deviation of $10,000. Assuming a Normal distribution, a
bout 95 percent of all households have an income over what amount?
Answer is 53,551 (How do I get this??)
1 answer:
Answer:
$53,550
Step-by-step explanation:
X ~ N(70,000 , 10,000²)
P(X > t) = 0.95
z = -1.645
-1.645 = (t - 70000)/10000
t - 70000 = -16450
t = 53,550
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