Make a histogram of these test scores Apparent Limits frequency 93-95 1 90-92 2 87-89 6 84-86 8 81-83 9 78-80 7 75-77 6 72-74 3 69-71 4 66-68 2 63-65 0 60-62 2 a) plot the cumulative percentage curve. b) using the graph in part a, find the approximate values for P30 and P70 c) using the graph in part a, find the approximate percentile ranks for scores of 70 and 79
a) Make a histogram of these test scores
Apparent Limits frequency
93-95 1
90-92 2
87-89 6
84-86 8
81-83 9
78-80 7
75-77 6
72-74 3
69-71 4
66-68 2
63-65 0
60-62 2
a) plot the cumulative percentage curve.
b) using the graph in part a, find the approximate values for P30 and P70
c) using the graph in part a, find the approximate percentile ranks for scores of 70 and 79
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