Suppose that daycare costs are normally distributed with a mean equal to $10,000 a year and a standard deviation equal to $2,000

Question

3 years ago

10

Suppose that daycare costs are normally distributed with a mean equal to $10,000 a year and a standard deviation equal to $2,000

.
what percentage of daycare cost over $10,000?
what percentage of daycare cost between $8,000 and $12,000?
what percentage of daycare cost between $6,000 and $14,000?

Mathematics

1 answer:

notka56 [123] · Answer 1 · 2022-04-08T23:53:06+03:00

notka56 [123]3 years ago

6 0

Answer:

50%, 68.26%, 95.54%

Step-by-step explanation:

Let X be the day care costs

X is N(10000, 2000)

Since normal distribution is symmetrical about the mean we get

above 10000, exactly 50% of day care cost would be .

Between 8000 and 12000,

= $P(8000$

Between 6000 and 14000

$P(6000$ %