An experiment was conducted by students at The Ohio State University in the fall of 1993 to explore the nature of the relationship between a person's heart rate and the frequency at which that person stepped up and down on steps of various heights.
A data frame with 30 observations on the following 7 variables.
number of experimenter block
resting heart rate (beats per minute)
final heart rate
height of step (
whether subject stepped
An experiment was conducted by students at The Ohio State University in the
fall of 1993 to explore the nature of the relationship between a person's heart
rate and the frequency at which that person stepped up and down on steps of
various heights. The response variable, heart rate, was measured in beats per
minute. There were two different step heights: 5.75 inches (coded as
lo), and 11.5 inches (coded as
hi). There were three rates of
stepping: 14 steps/min. (coded as
slow), 21 steps/min. (coded as
medium), and 28 steps/min. (coded as
fast). This resulted in six
combinations. Each subject performed the activity for three minutes. Subjects
were kept on pace by the beat of an electric metronome. One experimenter
counted the subject's pulse for 20 seconds before and after each trial. The
subject always rested between trials until her or his heart rate returned to
close to the beginning rate. Another experimenter kept track of the time spent
stepping. Each subject was always measured and timed by the same pair of
experimenters to reduce variability in the experiment. Each pair of
experimenters was treated as a block.
These data are available at DASL, the data and story library (http://lib.stat.cmu.edu/DASL/).
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