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vovikov84 [41]
2 years ago
14

Carmen drew line A and line B in the two scatter plots shown. one scatter plot contains 12 points indicating a negative correlat

ion and line A, which passes through the middle of points, with 6 above and 6 below, touching none of them; the other scatter plot contains 12 points indicating a positive correlation and line B, which passes through four of the points and sits above the other 8 points. Which statement is true? Both line A and line B are well-placed lines of best fit. Only line A is a well-placed line of best fit. Only line B is a well-placed line of best fit. Neither line A nor line B are well-placed lines of best fit.
Mathematics
1 answer:
blondinia [14]2 years ago
4 0

The true statement is that only line A is a well-placed line of best fit

<h3>How to determine the true statement?</h3>

The scatter plots are not given. However, the question can still be answered

The features of the given lines of best fits are:

<u>Line A</u>

  • 12 points in total
  • Negative correlation
  • Passes through the 12 points with 6 on either sides

<u>Line B</u>

  • 12 points in total
  • Positive correlation
  • Passes through the 12 points with 8 and 4 in either sides

For a line of best fit to be well-placed, the line must divide the points on the scatter plot equally.

From the given features, we can see that line A can be considered as a good line of best fit, because it divides the points on the scatter plot equally.

Read more about line of best fit at:

brainly.com/question/14279419

#SPJ1

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The measure of an interior angle of a regular octagon is how many degrees greater than the measure of an interior angle of a reg
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Answer:

Step-by-step explanation:

Sum of interior angle of any polygon = 180* (n- 2 )

Here, n= number of sides

Sum of interior angles of regular octagon = 180 * ( 8-2) = 180 * 6 = 1080°

In regular octagon, all the angles are congruent,

So, measure of an interior angle of regular octagon = 1080/8 =  135°

Sum of interior angles of regular hexagon = 180 * ( 6-2) = 180*4 = 720°

In regular hexagon, all the angles are congruent,

So, measure of an interior angle of regular hexagon = 720/6 =  120°

The measure of an interior angle of a regular octagon is  greater than the measure of an interior angle of a regular hexagon by 15°

3 0
3 years ago
A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25
GREYUIT [131]

Answer:

The upper limit of a 95% confidence interval for the population mean would equal 83.805.

Step-by-step explanation:

The standard deviation is the square root of the variance. Since the variance is 25, the sample's standard deviation is 5.

We have the sample standard deviation, not the population, so we use the t-distribution to solve this question.

T interval:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 15 - 1 = 14

Now, we have to find a value of T, which is found looking at the t table, with 14 degrees of freedom(y-axis) and a confidence level of 0.95(t_{95}). So we have T = 1.761

The margin of error is:

M = T*s = 1.761*5 = 8.805.

The upper end of the interval is the sample mean added to M. So it is 75 + 8.805 = 83.805.

The upper limit of a 95% confidence interval for the population mean would equal 83.805.

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3 years ago
On Monday, Jan made withdrawals of $15, $55, and $65 from her savings account. On the same day, her twin sister Julie made withd
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Answer:

340

Step-by-step explanation:

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The answer: A. 0.666666
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3 years ago
Please show work! will mark brainlest!!!!!!!!
GarryVolchara [31]

Answer:

34cm

4+2+5+9+6+3+3+(9-4+3)

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2 years ago
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