Correlation

Question 1

00.5✔ 1

Revolt · Accepted Answer

✔ 1

Question 2

decreases ✔ increasesstays the same

Revolt · Accepted Answer

✔ increases

Question 3

Complete the statements based on the information provided.

Revolt · Accepted Answer

The scatterplot including only the blue data points shows correlation. Including the orange data point at (3.8, 3.9) in the correlation would and the value of r.: a strong positive; The scatterplot including only the blue data points shows correlation. Including the orange data point at (3.8, 3.9) in the correlation would and the value of r.: strengthen; The scatterplot including only the blue data points shows correlation. Including the orange data point at (3.8, 3.9) in the correlation would and the value of r.: increase

Question 4

negative✔ positivezero

Revolt · Accepted Answer

✔ positive; The value of r is and is relatively close to , so the variables are associated. It appears that, as the age of an employee increases, the number of sick days taken .: positive; The value of r is and is relatively close to , so the variables are associated. It appears that, as the age of an employee increases, the number of sick days taken .: 1; The value of r is and is relatively close to , so the variables are associated. It appears that, as the age of an employee increases, the number of sick days taken .: closely; The value of r is and is relatively close to , so the variables are associated. It appears that, as the age of an employee increases, the number of sick days taken .: increases

Question 5

looselynot✔ closely

Revolt · Accepted Answer

✔ closely

Question 6

Select the statement which best describes the relationship between the price and sales.

Revolt · Accepted Answer

The value of r indicates that the number of sales decreases as the price increases.

Question 7

Select the most likely value of r for this data set.

Revolt · Accepted Answer

−0.78

Question 8

Select the most likely value of r for this data set.

Revolt · Accepted Answer

0.17

Question 9

If the temperature is converted to degrees Celsius and the electricity used to kilowatt-hours, how will the value of r be affected?

Revolt · Accepted Answer

It will stay the same because correlation is unitless.

Question 10

If age was on the vertical axis and miles per gallon on the horizontal axis, how would the correlation change? Select all statements that would apply to the new correlation coefficient.

Revolt · Accepted Answer

The sign would remain the same.; It would have the same value.

Correlation Answers

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