RELIABILITY AND ADEQUACY OF FABM-PRICE DATA 
53 
FARM PRICEOF NORTH DAKOTA WHEAT.AND THE MONTHLY 
AVERAGE MARKET PRICE AT MINNEAPOLIS 
Fig. 12. — North Dakota farm prices of wheat reported on or about the first of each month, 
with the prices for two consecutive dates averaged to obtain a price for a given month, 
and monthly average sale prices at Minneapolis show a correlation of + 0.9S7. Since 
January, 1924. all farm prices have been obtained on or about the 15th of each month 
MONTHLY FARM PRICEOF NORTH DAKOTA WHEAT.AND 
THE MINNEAPOLIS WEEKLY PRICE 
250 
200 
150 
100 
50 
'. ' -redpolls Market Price 
! A / (Week ending IS'*) 
1920 
1921 
1922 
1923 
Fig. 13. — North Dakota farm prices of wheat reported on or about the first of each 
month, with the prices for two consecutive dates averaged to obtain a price for a 
given month, and averages of all sales on the Minneapolis market for the weeks ending 
the 15th of each month show a correlation of - 0.984. Since January, 1924. all farm 
prices have been obtained on or about the 15th of each month 
