Without pouring over your report
in great detail, I have some questions. In looking at metabolic
pulls for the PS region in 2002 at rides of 50 miles to 99 miles from the
yearbook, I get 51 metabolic pulls out of 1647 starts. That is a 3.1% pull rate.
Where did you get numbers that made it 4.6%. Were your numbers from
something other than the 2002 yearbook? And if so why is the yearbook and your
data so different? The same occurs looking at the SE region, your number is 3.6%
while my number from the yearbook is 63 pulls over 1466 starts for a 4.3%
metabolic pull rate.
Then I copy from your report
below. In the first paragraph you state this is a comparison of metabolic
pulls in single day vs multiday. Then in the 2nd paragraph below the data
you state there is a significant difference in lameness pulls at single day vs
multiday. So which is it? Is your data lameness or is it
metabolic?
I guess us engineers like our data,
but we like to check it too.
Jim
Pioneer vs. Single Day Rides: The table below is the means and offset
for the seven regions with pioneer rides. The comparison is between metabolic
pulls in the single day vs. pioneer rides. The two regions without pioneer rides
in 2002 were the SE region and the NE region. Region Treatment Rate (%) Offset
>From Grand Mean
Region
Treatment Rate (%)
Offset from Grand Mean
Single Day
8.023
1.778
Pioneer
1.1807
-5.064
Grand Mean 6.244 Required F value for 95% confidence = 3.84 F
value = 34.51
The value of the F statistic
of this set exceeds (by a large amount) the threshold sufficient for a 95%
confidence so the null hypothesis is rejected with a confidence of 95%. That is,
there is statistically sufficient evidence that there is a difference in
lameness pull rates between pioneer rides and single day rides. What the
analysis shows is this difference is statistically significant that is the
trends of differences of lameness pulls cannot be explained by statistical
variability of the underlying population.
Conclusions:The conclusions regarding lameness pulls of this study is
that for the 2002 season there is statistically significant difference between
the lameness pull rates of single day (distance less than 100 miles) endurance
rides based on region. The same conclusion is drawn concerning pioneer rides and
single day rides in those regions with both. The difference between the pull
rates at pioneer rides and single day rides (in the seven regions that had
pioneer rides) is statistically significant and could not have arisen (to a 95%
confidence) from statistical variability
