The mean number of hours per day spent on the phone according to a national survey is four hours, with a standard deviation of two hours. If each time was increased by one hour, what would be the new mean and standard deviation?

4, 2

4, 3

5, 2

5, 3

5, 4

A random sample of 1,000 couples was asked the question, "How many children reside in your household presently?"

What number of children occurred the most frequently? Calculate this percent.

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