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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 2GP

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Question

The table below shows the examination results of 100 students as a percentage
Exam Result (%)
Frequency
0-9
3
10-19
20-29
12
30-39
10
40-49
12
50-59
27
60-69
23
70-79
3
80-89
2
90-99
a) What is the class width?
(b) What is the lower boundary of the modal class?
(c) Construct a cumulative frequency table and draw (on graph paper) a cumulative frequency graph.
(d) Use your cumulative frequency diagram to estimate
(i) the median value
(ii) the inter-quartile range

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