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Darina [25.2K]
3 years ago
12

Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 17 Use the empirical rule to

determine the following. (a) What percentage of people has an IQ score between 83 and 117 ? (b) What percentage of people has an IQ score less than 49 or greater than 151? (c) What percentage of people has an IQ score greater than 134?
Mathematics
1 answer:
RUDIKE [14]3 years ago
4 0

Answer:

(a) 68%

(b) 0.3%

(c) 2.5%

Step-by-step explanation:

<u>Data</u>

  • mean = 100
  • standard deviation (sd) = 17

(a) mean - sd = 100 - 17 = 83

mean + sd = 100 + 17 = 117

The 68–95–99.7 rule states that 68% of the values are within mean ± 1 sd

(b) mean - 3*sd = 100 - 3*17 = 49

mean + 3*sd = 100 + 3*17 = 151

The 68–95–99.7 rule states that 100% - 99.7% = 0.3% of the values are beyond mean ± 3 sd

(c) mean + 2*sd = 100 + 2*17 = 134

The 68–95–99.7 rule states that 95% of the values are within mean ± 2 sd , this means that 5/2 = 2.5% of the values are below mean - 2 sd, and 2.5% are above mean + 2 sd

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796.43?

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A furniture store has set aside 800 square feet to display its sofas and chairs. Each sofa utilizes 50 sq. ft. and each chair ut
miskamm [114]

Answer:

a) 50S + 30C ≤ 800

b) 1) MAX = S + C

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Step-by-step explanation:

Given:

Total space = 800 square feet

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b)

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3) Maximize the total expected daily profit:

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6 0
3 years ago
Given m || n, find the value of x and<br> y.
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Answer:

x = 41 , y = 139

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x and y are a linear pair and sum to 180° , that is

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