Peak heart rate (beats per minute) was determined both during a shuttle run and during a 300-yard run for a sample of n ! 10 individuals with Down syndrome (“Heart Rate Responses to Two Field Exercise Tests by Adolescents and Young Adults with Down Syndrome,” Adapted Physical Activity Quarterly [1995]: 43–51), resulting in the following data:

a. Construct a scatterplot of the data. What does the scatterplot suggest about the nature of the relationship between the two variables?

b. With x = shuttle run peak rate and y = 300-yd run peak rate, calculate r. Is the value of r consistent with your answer in Part (a)?

c. With x = 300-yd peak rate and y = shuttle run peak rate, how does the value of r compare to what you calculated in Part (b)?

Transcribed Image Text:

Shuttle 168 168 188 172 184 176 192 184 192 200 192 188 180 182 Shuttle 172 188 180 300-yd 300-yd 188 196 196