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alexandr1967 [171]
3 years ago
6

In one region, the september energy consumption levels for single-family homes are found to be normally distributed with a mean

of 1050 kwh and a standard deviation of 218 kwh. for a randomly selected home, find the probability that the september energy consumption level is between 1100 kwh and 1225 kwh.
your answer should be a decimal rounded to the fourth decimal place.
Mathematics
2 answers:
tatyana61 [14]3 years ago
6 0
The probability would be 0.1971.

We will calculate a z-score for each end of this interval.

z = (X-μ)/σ

For the lower limit:
z = (1100-1050)/218 = 50/218 = 0.23

For the upper limit:
z = (1225-1050)/218 = 175/218 = 0.80

Using a z-table (http://www.z-table.com) we see that the area under the curve to the left of, less than, the lower limit is 0.5910.  The area under the curve to the left of, less than, the upper limit is 0.7881.  To find the area between them, we subtract:

0.7881 - 0.5910 = 0.1971
elixir [45]3 years ago
6 0

Answer: FULL ANSWER TEST ON MY QUIZLET LINK: Lesson 6: Unit Test Statistics A Unit 8: Normal Probability Distributions.. sadly missing one question I forgot to include but 100% guaranteed.. READ QUESTIONS CAREFULLY

Step-by-step explanation:

Copy and paste this link:   https://quizlet.com/_67o8ig

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BabaBlast [244]

Step-by-step explanation:

the introduction of a fraction tells us that we are dealing with multiplications, and therefore a geometric sequence (where every new term is created by multiplying the previous term by a constant factor, the ratio r).

I think your teacher made a mistake, or you made one when typing the question in here.

there is no factor r that creates

15×r = 9

and

9×r = 5/27

it would mean that

15 × r² = 5/27

r² = 5/27 / 15 = 5/27 × 1/15 = 5/405 = 1/81

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but 15 × 1/9 = 5 × 1/3 = 5/3 is NOT 9

and 9 × 1/9 = 9/9 = 1 is NOT 5/27

so, this can't be right.

on the other hand

15 × r = 9

r = 9/15 = 3/5

and then

9 × 3/5 = 27/5

so, either the sequence should have been

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or (and I suspect this to be true)

15, 9, 27/5

under that assumption we have

s1 = 15

r = 3/5

sn = sn-1 × r = s1 × r^(n-1) = 15 × (3/5)^(n-1)

s10 = 15 × (3/5)⁹ = 15 × 19683/1953125 =

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2 years ago
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Answer:

0.02651

Step-by-step explanation:

P(all 5 are boys) =

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Step-by-step explanation:

this is the answer guys.

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