Correlation

As x increases, y decreases.

• A) no correlation

• B) negative correlation

• C) correlation coefficient

• D) positive correlation

The table shows the lengths and corresponding ideal weights of sand sharks. Which r-value is more accurate for the data?

• r = 0.99

• r = -0.90

• r = 0.09

• r = -0.099

The table shows the attendance at a flag football game for the first 8 games of the season. What is the correlation of the data?

• Strong Positive

• Strong negative

• Weak Postive

• Weak Negative

• No correlation

Determine the line of best fit for the data shown.

If the correlation coefficient, r, of a data set is r = 0. 32. What type of correlation does the data have?

• Strong Positive

• Strong negative

• Weak Postive

• Weak Negative

• No correlation

The table below gives the height and the shoe sizes of six male students. Predict the height of a student that has a shoes size of 10.

• -40.23

• -15.60

• 0.42

• -15.39

The table gives the number of hours spent studying for an algebra exam (x) and the final exam (y). Determine the correlation of the data.

• Weak positive

• Weak Negative

• Strong Positive

• Strong Negative

13. What is the y-intercept (a) of the regression equation based on the given data

set?

• a. 0.83

• b. 0.93

• c. 1.14

• d. 1.67

15. Which of among the choices is the equation of a regression line based on the

data table below?

• a. ŷ = 15 + 2.47x

• b. ŷ = 15 − 2.47x

• c. ŷ = 21.97 + 1.45x

• d. ŷ = 21.97 − 1.45x

Using the regression equation: length (cm) = 1.1 forklength (cm) + 4.1

Predict the length of a shark with a fork length of 4cm.

• 4.1cm

• 4.4cm

• 8.5cm

• 5.2cm