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Lyrx [107]
3 years ago
15

Step on how to calculate variance ​

Mathematics
1 answer:
suter [353]3 years ago
4 0

Answer:

Step-by-step explanation:

  1. calculate the mean of your data set(x bar)
  2. Subtract each data value from the mean and calculate the square
  3. add all of these squares
  4. divide by n-1 (For a sample) to get the variance

If you’re calculating the variance of a population(not sample) divide by N.

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Answer:  89.7 ft

<u>Step-by-step explanation:</u>

Find the arc length (s) of the semi-circle.  Then divide that length by 7.

s = r · θ      where r is the radius and θ is the angle in radians

s = (400 ÷ 2) · π        <em>(radius is diameter divided by 2)</em>

  = 200π

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The length of the arc is 628.3 ft.  Divide that by 7 to find the distance between each home.

628.3 ÷ 7 = 89.7

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3 years ago
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2 years ago
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