In the United States, about how many hours per day does the typical child aged 2 to 4 spend watching television or using electronic media?

You watch a demonstration taking place on campus. You are excited and when you get home, you tell your roommate Alberta about what you saw. Another roommate, Lucy, returns later and you overhear her excitedly telling Alberta about the same demonstration, but her description doesn't sound anything like what you saw. What most likely accounts for this difference??

a. ?eidetic imagery b. ?proactive inhibition c. ?constructive memory d. ?retrograde amnesia

If we know the sample variance, can we use that information to find the sample standard deviation?

a. Yes, simply take the square root of the variance to find the standard deviation. b. Yes, simply square the variance to find the standard deviation. c. Yes, simply divide the variance by N to find the standard deviation. d. No, it is not possible.