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JSS2 Mathematics Third Term: Tables, Timetables and Charts

Reading Tabulated Data

Tabulated data means information given in a table. Tabulated data is often in numerical form. Numerical tables are a neat way of storing a lot of information. They have a wide range of uses. When reading a numerical table, always look first at its title, its column headings and its row headings. These show what the table is all about. Look at the headings in the table below, it’s a monthly rainfall chart. The column heading show the letters J, F, M, …. These are abbreviations for January, February, March, …

J F M A M J J A S O N D
Sokoto 0 0 0 10 48 91 155 249 145 15 15 0
Jos 3 3 28 56 203 226 330 292 213 41 3 3
Ibadan 10 23 89 137 150 188 160 84 178 155 46 10
Port Harcourt 66 109 155 262 404 660 531 318 516 460 213 81

Abbreviations are often used in tables. They save space. We often have to use common sense when deciding what the abbreviations are short for. The row headings give the names of four towns for any month.

We read the table by making a cross-reference.  For example, to find the rainfall for Ibadan and down from S. Where the two directions corss, gives the information. On average, Ibadan gets 178 mm of rain in September.

Refer to the table above for the exercise

1. Use the table to find the average rain fall for the following:

a. Sokoto in January

b. Port Harcourt in December

c. Jos in May

d. Ibadan in March

e. Port Harcourt in June

f. Sokoto in August

g. Ibadan in July

h. Jos in October

i. Sokoto in February

j. Jos in November

i. Port Harcout in September

2. For each town, name the month which has the highest rainfall.

3. For each town, name the month(s) with the lowest rainfall.

Social and environmental issues

The exercise below gives practice in interpreting data based on important social and environmental issue. Discuss this question with your classmates and teacher. Supplement the exercise with relevant articles and data from newspaper.

Exercise

The table below shows the gender gaps in primary school enrolment in six Local Government Authorities (LGA) of a state for the years 2006/07 to 2008/09. [fusion_builder_container hundred_percent=”yes” overflow=”visible”][fusion_builder_row][fusion_builder_column type=”1_1″ background_position=”left top” background_color=”” border_size=”” border_color=”” border_style=”solid” spacing=”yes” background_image=”” background_repeat=”no-repeat” padding=”” margin_top=”0px” margin_bottom=”0px” class=”” id=”” animation_type=”” animation_speed=”0.3″ animation_direction=”left” hide_on_mobile=”no” center_content=”no” min_height=”none”][A note on gender gap: if a school population is 54% boys and 46% girls, then the gender gap is 8 percentage points].

Average gender gap

LGA 2006/07 2007/08 2008/09
LGA 1 25.0 13.1 9.3
LGA 2 30.8 11.8 7.2
LGA 3 11.5   3.7 -4.7
LGA 4 35.6 20.9 15.5
LGA 5 33.9 21.6 22.7
LGA 6 28.6 25.2 19.2
Average 27.6 16.0 11.5

Read more below-

https://passnownow.com/lesson/tables-timetables-charts/[/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]

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