HW#13 Name: Cathu Fischer Period tem-and-Leaf & Box-and-Whisker Plots --Key Math Concepts - Qi is the median of the lower half of the data, Q is the median. Qs is the median of the upper half of the data, and Q4 is the maximum value of the data set. IQR = Q- QI 7 1. The back-to-back stem-and-leaf plot gives data about the number of girls (on the left) and boys (on the right) at each high school in Greene County who purchased their own cars with money they earned working. How many high schools are in Greene County? What is the mean number of boys who bought their own cars? Find the median of the distribution of girls. 4 3 10 1 2 2 3 4 1031 79 2142 1151 31 - 13 girls 112-12 boys Count the pieces of data on one side. This is the number of schools. {_PREPRAPREL Number of schools = Mean = sum of the data + number of items Mean (boys) = (10+11+12 + 23 + 24 +31 +37 +39 +42 +51) + 10 = Median: The number of items is even. Find the average of the two middle numbers: Median = 30+31 2 boys bought cars and a There are median of _ schools in Green County. A mean of_ _girls bought cars