Key Stage 3 National Strategy Securing progression in handling data © Crown Copyright 2003 Year 8 slides

© Crown Copyright 2003 Note to teachers The following 16 still and animated slides are for use with the Interacting with mathematics in Key Stage 3 Year 8 handling data mini-pack. They can be used as alternatives to the poster and transparencies provided with the mini-pack. They are intended to provide the focus for whole class discussion, as suggested in the Year 8 handling data unit. The file ‘Y8 slide references’ on the CD-ROM ‘Securing progression in handling data’ cross-references each slide with the phases of the Year 8 unit.

The handling data cycle Specifying and planning Collecting data Interpreting and discussing Processing and representing evaluate results © Crown Copyright 2003

Television Number of females Number of males Number of hours watched 0 – 9 10 – – – 39 Over 39 Hypothesis: Pupils watch more TV than adults

Cycling Males who cycle Total number of males Height (cm) h   h   h   h   h   h   h  200 h  200 Hypothesis: Males who cycle to school are taller than those who don’t

>5 Number of cans drunk in last 2 days Frequency (1000s) Drinks Hypothesis: Boys drink more than girls male pupils female pupils

Hypothesis: Boys in our year are taller than girls Heights Height (cm)Number of boysNumber of girls 90 to 100 > 100 to 110 > 110 to 120 > 120 to 130 > 130 to 140 > 140 to 150 > 150 to 160 > 160 to 170 > 170 to 180 > 180 to 190 > 190 to 200 over

% secondary pupils % of all pupils England With a mobile phone Without a mobile phone With access to the internet Without access to the internet Hypothesis: More secondary pupils than primary pupils have access to the internet at home Internet

The handling data cycle Specifying and planning Collecting data Interpreting and discussing Processing and representing evaluate results

The handling data cycle Specifying and planning Collecting data Interpreting and discussing Processing and representing evaluate results

Football: Drawing pie charts Accurately construct a pie chart for one of the bar charts. Sketch pie charts to display this data. Compare the similarities and the differences between the two charts. Time of goals (Premiership) 16/12/01 Time of goals (Second Division) 16/12/ Time (Mins) FrequencyFrequency

Football: Calculating averages Estimate the median and mode for the Premiership or Second division. Compare the results. What does each average tell you about the charts? Extension: Repeat for first and third divisions. Time of goals (Premiership) 16/12/01 Time of goals (Second Division) 16/12/ Time (mins) FrequencyFrequency

J F M A M J J A S O N D Temperature Month London Wellington Average monthly temperature in Wellington and London

Ireland Do the charts show that a there are more people under 15 in Ireland than in Greece b there are fewer people under 15 in Greece than in Ireland c there is a higher proportion of people under 15 in Ireland than in Greece? Greece Age of people in Greece and Ireland Under 15 Over

Photos: Estimating measures height weight age income time mean? median? mode? range?

Photos: Comparing groups Height Weight Age Income Time

Photos: Sketching distributions

Photos: Recognising distributions

© Crown Copyright 2003