Download the HalfTime workbook

The HalfTime.xlsx workbook may be downloaded by clicking here.


Of all the many possible exercises which might be undertaken with the HalfTime dataset, one could involve getting scatterplots of half-test scores.


For example, we could ask Lertap to ask Excel to plot the "Odds" score against the "Evens" (the correlation of these two scores is 0.88). This is done using the "Scatterplotter". Then, we could compare the plot with another one corresponding to "1stHalf" and "2ndHalf" (correlation of 0.63). Is there some reason for observing such a relatively low correlation among the 1stHalf and 2ndHalf scores?