The Wechsler Preschool and Primary Scale of Intelligence (WPPSI-IV) is administered to children as young as __________ and as old as 7 years and 7 months

Vision is the _______ of the five senses at birth

Fill in the blank with correct word

If the predicted direction in the alternative hypothesis is correct, then a one-tailed t test will be more powerful than a two-tailed t test.

a. true b. false