The normal distribution provided a good fit for two of these variables: Time to run
30 m (December) and Heartbeats after 30 press-ups. The first variable, Time to run
30 m, was constructed by simulating a normal continuous distribution. Normality
can be checked easily in this variable from its graphical representation; the skewness
and kurtosis coefficient were very close to zero, although the mean, median, and
mode did not exactly coincide. Heartbeats after 30 press-ups was a discrete
variable; however, its many different values, its shape, and the values of its different
parameters suggested that the normal distribution could provide an acceptable fit