One-Variable Data

Statistical displays - A review

Create and interpret histograms and polygons

Create and interpret cumulative frequency tables

Create and interpret cumulative frequency polygons

Create and interpret boxplots

EXT: Create and interpret graphs using log scales

Connecting boxplots and histograms

Interpret pie charts

EXT: Interpret area charts and radar graphs

Mean, median mode and range (calculation from graphs and charts)

Mean, median mode and range (find missing data)

Mean, median mode and range (comparing data sets)

Comparisons and predictions

Mean, median, mode and range (combined set)

How the shape affects choice of centre and spread

Measure of central tendency suitability

Limitations of measures of centre and spread

Frequency tables and grouped data

Frequency distribution for grouped data

Statistics on grouped data

Quartiles and inter-quartile range

Quartiles, deciles and percentiles

5 Figure summary

Identify outliers

Using a fence to find outliers

Effects of outliers

Standard deviation

Standard deviation using sample population

Applications of standard deviation

Applications of standard deviation using sample population

Grade 12

Interpret pie charts

Interactive practice questions

A technology company wishes to see what MP3 players people are using. They took a small sample and found the following:

Apple: $156$156

Sandisk: $19$19

Samsung: $32$32

Other: $74$74

A pie chart is divided into four sectors, each representing a different technology company and each labeled with letters. The colors of the sectors are yellow-green, green, purple, blue and red, arranged in a clockwise manner. The yellow-green sector is labeled "C" and is the largest sector. The red sector is labeled "B" and is the second largest sector. The purple sector is labeled "D" and is the third largest sector. The blue sector is labeled "A" and is the smallest sector.

Which sector represents Samsung?

A

A

B

B

C

C

D

D

Easy

< 1min

Some non-profit organisations were asked how many operations they are running. The results are given below:

Easy

3min

Mr $Brown$ did a survey to find out how students usually spend their spare time. Then he recorded the data in the form of a pictograph.

Use the key to answer the following questions:

Easy

1min

The adjacent circular diagram represents the results of grade 8 class president elections for the year $2010$ .

Easy

< 1min

Outcomes

12D.D.1.5

Interpret statistical summaries to describe the characteristics of a one-variable data set and to compare two related one-variable data sets; describe how statistical summaries can be used to misrepresent one-variable data; and make inferences, and make and justify conclusions, from statistical summaries of one-variable data orally and in writing, using convincing arguments

What is Mathspace

About Mathspace