After every score in a sample is multiplied by 3, the mean is calculated and found to be M = 21 . What was the mean for the original scores?

A dominant gene controls the expression of a characteristic even when a recessive gene is the other half of the gene pair

Indicate whether this statement is true or false.

Tracey lost her mother in a tragic auto accident last week

She has experienced sadness, tearfulness, and problems sleeping since the accident. She also has no desire to go out with her friends for the time being. Tracey likely _____ a) has developed an anxiety disorder. b) will develop a psychotic depression. c) has major depressive disorder. d) is showing a normal reaction to the death of a loved one.