2-4 example9

# 2-4 example9 - Student Grady Silnonton Course Math119...

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Unformatted text preview: Student: Grady Silnonton Course: Math119: Elementary Statistics - Spring 2.010 - CRN: 49239 Instructor: Shawn Parvini - 16 weeks Date: 2/18/10 Book: Triola: Elementary Statistics, 11e Time: 11:11 ANI Listed below are blood groups of 0, A, B, and AB of randomly selected blood donors. Construct a pie chart depicting the distribution of these blood groups. AAABOOBOOOAAAOAOOOAOAB A pie chart is a graph that depicts qualitative data as slices of a circle, in which the size of each slice is proportional to the frequency count for the category. Begin by ﬁnding the frequency of each blood type. The completed frequency table is shown below. Next calculate the percentage frequency of each blood group. To do so, ﬁrst calculate the sum of all frequencies. 7 + l + 2 + 10 = 20 The percentage frequency is equal to the category frequency divided by the sum of all frequencies, multiplied by 100%. The table of percentage frequencies is shown below. Blood Group Percentage Frequency A "#20 X 100% = 35% B 13’20 X 100% = 5% AB 2.00 X 100% = 10% O 10:20 X 100% = 50% The sizes of the slices of the circle representing the pie chart are given by the percentages calculated in the previous step. That is, 35% of the pie chart shows blood group A, 5% of the pie chart shows blood group B, 10% of the pie chart shows blood group AB, and 50% of the pie chart shows blood group 0. Use these results to construct the pie chart depicting the distribution of these blood groups. The pie chart is shown below. Page 1 ...
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