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India
Class IX

Create and interpret cumulative frequency polygons

Interactive practice questions

Consider the data below.

Height (cm) Frequency
$155\le h<160$155h<160 $10$10
$160\le h<165$160h<165 $20$20
$165\le h<170$165h<170 $35$35
$170\le h<175$170h<175 $20$20
$175\le h<180$175h<180 $15$15
a

Create a cumulative frequency polygon from this data.

Height (cm)Cumulative Frequency5101520253035404550556065707580859095100155160165170175
b

Estimate the median from the graph to the nearest $5$5 cm.

c

Estimate the upper and lower quartiles based off the graph.

Write both on the same line separated by a comma and to the nearest $5$5 cm.

d

Estimate the interquartile range from the answers to part (c).

Give your answer to the nearest $5$5 cm.

Easy
4min

Consider the data below of times taken to walk to the nearest park.

Easy
3min

Consider the cumulative frequency polygon below.

Easy
1min

Consider the cumulative frequency polygon below.

Medium
1min
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Outcomes

9.SP.S.1

Introduction to Statistics: Collection of data, presentation of data – tabular form, ungrouped/ grouped, bar graphs, histograms (with varying base lengths), frequency polygons, qualitative analysis of data to choose the correct form of presentation for the collected data.

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