35.12 Quick review questions
A study of athletes (Telford and Cunningham 1991) examined the relationship between the height and weight of n=37 rowers at the Australian Institute of Sport (AIS), as shown in Fig. 35.19.

FIGURE 35.19: Scatterplot of Weight against Height rowers at the AIS
- Using the ‘rise over run’ idea, the slope is approximately
- The y-variable is
- The regression equation is ˆy=−138+1.2x.
What does x represent?
- What does the ‘hat’ above the y mean?
- To two decimal places, what weight would be predicted for a rower who is 180cm tall?
- The standard error of the slope is 0.112. What is the value of the test statistic
(to one decimal place) to
test if the population slope is zero?
- True or false? The P-value for this test will be very small
- True or false? The units of the slope are kg/cm
- True or false? Making a prediction for the weight of a
rower weighing 220 kg would be an example of extrapolation
References
Telford RD, Cunningham RB. Sex, sport, and body-size dependency of hematology in highly trained athletes. Medicine and Science in Sports and Exercise. 1991;23(7):788–94.