A sample of n = 10 scores is selected from a population. The variability of the scores in the sample will tend to be ____ the variability of the scores in the population.

An effect of ability grouping is that

A) students in honors courses are more motivated to learn. B) students in low-ability courses have lower achievement and involvement. C) honors courses attract more experienced teachers. D) All of the above.

Normally, children shed synapses up to age ________ when about ________ are lost

A) 8/25% B) 16/50% C) 12/50% D) 18/25% E) 4/10%