The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is 39 hours and the median is 35.2 hours. Twenty-four of the families in the sample turned on the television for 24 hours or less for the week. The 13th percentile of the data is 24 hours. Approximately how many families are in the sample? Approximately 200 families turned on their televisions for less than 35 hours. What is the value of the 50th percentile?