Estimate r
close to -1
Estimate r
Close to 1
Interpret r=.45
somewhat weak and positive
Calculate the correlation
.84
Calculate Correlation
.89
Predict the interval of time between eruptions if the previous eruption lasted 4 minutes
86.51 minutes
Predict the long-jump distance for a student who had a 40-yard-dash time of 6 seconds
140.8 inches
Would you be willing to use the regression line to predict the long-jump distance for a student whose 40-yard sprint time is 3 seconds? Explain.
No, far outside data value
Find the Residual.
2.07 minutes
Calculate and interpret the residual for March, when the average temperature was 49.4°F and Joan used an average of 520 cubic feet per day.
443.422 cubicfeetperday, res=76.578
Interpret the slope of the regression line.
decreases by 19.87 cubic feet per day for each additional degree of Fahrenheit for the average monthly temperature
Use technology to calculate the equation of the least-squares regression line relating y = price to x = screen size.
Y = −575.23 + 25.41x
Use technology to calculate the equation of the least-squares regression line relating y = number of larvae to x = number of stumps.
y = −1.29 + 11.89x
Find the equation of the least-squares regression line for predicting the number of wins from number of goals scored.
Y=−0.15+0.29x
make a segmented bar chart
expl = age
Make a scatterplot
2.2 #5
