Approximately how many children under the age of 18 in the U.S. live in single-parent households?

You and your daughter are walking down the street and you run into a man who has long hair and is wearing a pink polo shirt. Based on this visual, your 7-year-old daughter:

a. would likely think he is a woman. b. would likely think he is a man. c. would likely think he is a man and a woman. d. would likely think he is neither a man nor a woman.

The mean of the entire distribution of sample means represents

a. a parameter b. a statistic c. the sampling error d. none of these