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andreev551 [17]
4 years ago
14

Jemma keeps a log of the books read during a summer reading program. She creates the line plot. Each dot represents the number o

f books read in one week. How can you determine how many weeks long the summer reading program was?
Mathematics
1 answer:
Fynjy0 [20]4 years ago
7 0

Step-by-step explanation:

Since each dot represents the number of books read in one week, to determine how many weeks long the summer reason program was, just count all the dots, and divide the result by the number of books represented by a dot.

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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>
  • ∑x = 49
  • Mean = 8.167
  • ∑(X - Mx)2 = SSx = 146.833

<h3>Y Values </h3>
  • ∑y = 77
  • Mean = 12.833
  • ∑(Y - My)2 = SSy = 266.833

<h3>X and Y Combined </h3>
  • N = 6
  • ∑(X - Mx)(Y - My) = 194.167

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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2 years ago
How can you write an equation for a line from one point and the slope?
Andrew [12]

Answer y=mx+b


Step-by-step explanation: b is the y intercept and x is the slope


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3 years ago
140 for 21 minutes how much for 18.minutes
statuscvo [17]
In 18 minutes its 120 because you find the unit
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3 years ago
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marshall27 [118]
That is a 45 45 90 triangle.
The legs of such a triangle equal the hypotenuse divided by the sq root of 2
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88.74


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3 years ago
3 gal 2 c=​___ fl oz. PLEASE HELP!!!
Bogdan [553]
Yea what she said was correct
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