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Lesechka [4]
3 years ago
10

Variance and standard deviation

Mathematics
1 answer:
kirza4 [7]3 years ago
3 0

Answer: 8.3

Step-by-step explanation:

To find the variance, you want to find the mean of the data.

\frac{3+3+8+1+9+6}{6} =5

Now that we have the mean, we find the difference between each data point and the mean.

3-5=-2

3-5=-2

8-5=3

1-5=-4

9-5=4

6-5=1

With the difference, you square each and find the average.

(-2)²=4

(-2)²=4

3²=9

(-4)²=16

4²=16

1²=1

\frac{4+4+9+16+16+1}{6} =\frac{25}{3}

The variance is 8.3.

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Aquarius is an underwater ocean laboratory located in the Florida keys national marine sanctuary. Solve the equation 31/25x = -6
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Answer:

x=-50

Step-by-step explanation:

31/25x=-62

x=-62/(31/25)

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Three bottles of different sizes contain different compositions of red and blue candy. The largest bottle contains eight red and
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Answer:

0.3667

0.2727

Step-by-step explanation:

a)

P (Blue) = P (large and Blue) + P (mid and Blue) + P (small and Blue)

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b)

Conditional Probability:

P (Large / Blue ) = P (large and Blue) / P ( Blue)

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3 years ago
The data set 80, 84, 79, 44, 87, 73, 89, 90, 82, 89, 93, 97, 77, and 71 is graphed below. A graph shows the horizontal axis labe
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Based on the information given, it can be deduced that the distribution is a skewed distribution and the best choice is a median.

<h3>How to calculate the mean.</h3>

The mean will be:

= (80 + 84 + 79 + 44 + 87 + 73 + 89 + 90 + 82 + 89 + 93 + 97 + 77 + 71) / 14

= 1135/14

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The median will be the middle number after the numbers are arranged in ascending order. This will be:

44, 71, 73, 77, 79, 80, 82, 84, 87, 89, 89, 90, 93, and 97. Therefore, the median will be:

= (82 + 84) / 2

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Lastly, the measure of center that is the best choice for this data set is median.

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Write these numbers as fractions. Simplify the answers. 0.5, 12.3, 0.07, 0.625
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0.625 => 625/1000 => 25/40 => 5/8

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3 years ago
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