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Dafna11 [192]
3 years ago
14

A recent survey was conducted to compare the cost of solar energy to the cost of gas or electric energy. Results of the survey r

evealed that the distribution of the amount of the monthly utility bill of a 3-bedroom house using gas or electric energy had a mean of $92 and a standard deviation of $13. If the distribution can be considered mound-shaped and symmetric, what percentage of homes will have a monthly utility bill of more than $79? a. approximately 34%b. approximately 16%c. approximately 95%d. approximately 84%
Business
1 answer:
RoseWind [281]3 years ago
7 0

Answer:

option d) approximately 84%

Explanation:

Data provided in the question:

Mean, m = $92

Standard deviation, s = $13

Now,

we have to calculate percentage of homes will have a monthly utility bill of more than $79 i.e P(X > 79)

also,

P( X > 79) = 1 - P( X < 79)

Z-score for (X = 79 ) = \frac{X-m}{s}

Z = \frac{79-92}{13}

or

Z = -1

From the standard Z value vs P table, we have

P( Z < -1 ) = 0.1587

Thus,

P( X < 79) = P( Z < -1 ) = 0.1587

therefore,

P(X > 79) = 1 - 0.1587

or

P(X > 79) = 0.8413

or

= 0.8413 × 100%

= 84.13%

Hence,

option d) approximately 84%

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Answer:

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Explanation:

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Setler [38]

Answer:

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________________________

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3 years ago
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Fantom [35]

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almond37 [142]

Answer:

answer is b

Explanation:

8 0
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Georgia [21]

Answer: (A) Antitrust

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