Question: Department of Agriculture and Livestock Development researchers in Kenya estimate that yields in a certain district should approach the following amounts, in metric tons per hectare: groundnuts, 0.50; cassava, 3.70; beans, 0.30. A survey undertaken by a district agricultural officer on farm holdings headed by women reveals the following results:
There are 100 farm holdings in the sample.
a. Test the hypothesis that these farm holdings are producing at the target levels of this district for each crop.
b. Test the hypothesis that the farm holdings are producing at lower than target levels.
c. Why would you want to be extremely careful in interpreting the results of this study, even if great care were taken in selecting a truly random sample?