Home What's New Message Board
BigPumpkins.com
Select Destination Site Search
Mother weight vs Offspring weight 2005 to 2010 GPC

Photo Credit:  bathabitat
 
Jump to Related Links:

Date Taken

Date Submitted

Location

View Count

1/20/2011 1/20/2011 9:32:23 PM http://www.bigpumpkins.com/MsgBoard/ViewThread.asp?b=19&p=377628 2261

Previous

1658 x 1622 x 2

1658 x 1622 x 2

 

Next

Tea Brewer

Tea Brewer

Click Here to Submit

I looked at all the GPC data available, going back to 2005, and used just those entries that had the mother seed wt recorded along with the offspring wt. Then doing a simple linear regression, I looked at the relationship between the two. There is actually a statistically significant relationship. Here's the resulting equation: Offspring_weight = 483 + (Mother_seed_weight x 0.304) Here's a table with the expected average results for a range of mother wts. mother_wt------Average_offspring_wt 200---------------543.8 400---------------604.6 600---------------665.4 800---------------726.2 1000--------------787 1200--------------847.8 1400--------------908.6 1600--------------969.4 It's noisy, of course, but explains about 8.5% of the variation (r^2=0.085). If we assume the standard deviation is constant across the range of mother weights than larger mother weights would, on average, have a higher probability of growing that 2000 lb offspring. I looked at individual years' data and they all show pretty much the same trend as all years combined.


Top of Page

Questions or comments? Send mail to Ken AT bigpumpkins.com.
Copyright © 1999-2024 BigPumpkins.com. All rights reserved.