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VladimirAG [237]
3 years ago
11

Gloria collected 23 faintail and comet goldfish. There were 11 fewer fantails than comets. How many comets did Gloria have?

Mathematics
1 answer:
likoan [24]3 years ago
5 0
There’s 23 total of both faintail and comets. But there’s 11 Fewer faintails, so 23-11= 12
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5. Rounded to three decimal places, what is the value of r for this data set?
IrinaVladis [17]

The value of correlation coefficient (r) for the dataset is 0.981

<h3>What is correlation coefficient (r)?</h3>

The correlation coefficient (r) is used to determine the closeness and association of a scatter plot points.

The dataset is given as:

  • x: 8  15  3  7  2  14
  • y: 15  21  6  12  3  20

Using a graphing calculator, we have the following parameters:

<h3>X Values </h3>
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  • ∑(X - Mx)2 = SSx = 146.833

<h3>Y Values </h3>
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  • Mean = 12.833
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<h3>X and Y Combined </h3>
  • N = 6
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The correlation coefficient (r) is then calculated as:

r = \frac{\sum{((x - My)(Y - Mx)) }}{ \sqrt{((SSx)(SSy))}}

This gives

r = \frac{194.167 }{ \sqrt{((146.833)(266.833))}}\\

r = 0.9809

Approximate

r = 0.981

Hence, the value of correlation coefficient (r) for the dataset is 0.981

Read more about correlation coefficient at:

brainly.com/question/4219149

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morpeh [17]

Answer:

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Explanation:

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Now substitute m = -1/7 and (a,b) = (5, - 6)

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Solve for y:

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