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MrRa [10]
2 years ago
10

Help help helppppppppp

Mathematics
1 answer:
Yanka [14]2 years ago
7 0

Geometry

You need to find the area of the square first.

8x8=64un^2

Then you must find the area for the four triangles.

8x6=42un^2

42un^2/2=21un^2

Then multiply this by four to find the area of all the triangles.

21un^2x4=84un^2

Then add the areas of the triangles and squares.

84un^2+64un^2=148un^2

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Using the normal distribution, it is found that 1851 people would have an IQ less than 115.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
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The mean and the standard deviation are given, respectively, by:

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The proportion of IQ scores less than 115 is the <u>p-value of Z when X = 115</u>, hence:

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Z = \frac{115 - 100}{15}

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Z = 1 has a p-value of 0.8413.

Out of 2200 people:

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More can be learned about the normal distribution at brainly.com/question/27643290

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