Calcium, zinc, and vitamins A, B6, B12, C, D, and E are considered _____

During what developmental period are individuals most likely to notice that it is more difficult to perceive images in sharp focus and to see in dim light?

a. late teens b. young adulthood c. middle adulthood d. late adulthood

What term refers to the number of scores that are free to vary?

a. sum of squares b. N c. degrees of freedom d. variance