Slope of a fit line from r and the spreads
Grade 11 Math Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
Pia's class compares practice-test scores (x) with final-test scores (y), r = 0.8. A student is 2 spreads above the mean on x, z = 2. How many spreads from ȳ is the predicted y?
Tala's class compares practice-test scores (x) with final-test scores (y), r = 0.5. A student is 2 spreads below the mean on x, z = -2. How many spreads from ȳ is the predicted y?
Zee's class compares practice-test scores (x) with final-test scores (y), r = 0.6. A student is 1.5 spreads above the mean on x, z = 1.5. How many spreads from ȳ is the predicted y?
Jun's class compares practice minutes (x) with free throws made (y). The fit line is ŷ = 20 + 3x. One dot is (15, 70). What is its residual?
Luz's class compares temperature in °F (x) with ice melt minutes (y). The fit line is ŷ = 60 − 1.5x. One dot is (20, 34). What is its residual?
Milo's class compares miles from school (x) with bus ride minutes (y). The fit line is ŷ = 12 + 4x. One dot is (6, 33). What is its residual?
r = 0.8; spread of x = 4; spread of y = 10. Noah's class compares practice minutes (x) with free throws made (y). Now the class wants a line that predicts x from y, using the table shown. What is its slope?
r = 0.5; spread of x = 4; spread of y = 5. Pia's class compares sunlight hours (x) with bean plant height (y). Now the class wants a line that predicts x from y, using the table shown. What is its slope?
r = -0.6; spread of x = 10; spread of y = 5. Tala's class compares temperature in °F (x) with ice melt minutes (y). Now the class wants a line that predicts x from y, using the table shown. What is its slope?
r = 0.9; spread of x = 6; spread of y = 4. Zee's class compares miles from school (x) with bus ride minutes (y). Now the class wants a line that predicts x from y, using the table shown. What is its slope?
