Failing to reject H0 when it should have been is a _____ error

The number of holidays people celebrate per year represents a _____ variable

a. qualitative b. nominal c. discrete d. continuous

Why might children in lower socioeconomic classes still be growing taller while those in the middle and upper socioeconomic classes are not?

a. Nutrition for all children is becoming poorer. b. Medical care has not yet resulted in a growth trend in lower SES classes. c. Poorer children are still benefiting from improved nutrition. d. They are not? this is a myth.