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Grade 7 Data Handling and Probability Online Lessons

Grade 7 Data Handling and Probability Online Lessons.
Areas Covered:
1. Meaning and collection of data
2. Representing data using a frequency distribution table
3. Choosing suitable scale for graphs
4. Representing data using pictographs and bar graphs
5. Interpreting bar graphs
6. Representing data using pie charts and line graphs
7. Interpreting travel graphs

Lessons (20)

• 1.    From patients’ records in a certain hospital, the number of patients admitted per week for 36 weeks was shown below. 25 28 35 42 37 37 35 38 37 40 15 28 15 42 28 25 20 28 35 37 35 35 40 37 42 15 35 28 40 42 28 35 42 40 35 40 a) Represent the data using a frequency table. b) How can the data help the hospital?
  9m 36s

• 2.    During the Kenya Defence Forces (KDF) recruitment exercise, the heights of recruits in centimetres were as shown below. 179 178 182 176 182 182 176 178 179 181 182 176 176 179 183 176 183 178 181 182 181 182 182 178 182 178 182 181 176 179 Draw a frequency table to represent the data.
  6m 33s

• 3.    The table below shows class attendance in one week in a class of 40 learners. Choose a suitable scale that you can use to represent the data in a graph.
  3m 1s

• 4.    The table below shows the size of land in acres owned by five different people in a village. Choose a suitable scale that you can use to represent the data in a graph.
  3m 15s

• 5.    The table below shows the packets of milk sold in a supermarket in five days. Represent the number of packets of milk using a pictograph.
  4m 57s

• 6.    The table below shows the number of tree seedlings four learners planted during the World Environmental Day. Represent the number of seedlings using a pictograph.
  4m 26s

• 7.    The table below shows the number of babies immunized against polio in a dispensary for five months. Represent the number of babies immunized using a pictograph.
  5m 36s

• 8.    During a blood donation exercise to help accident victims, five centres collected blood in pints as shown in the table below. Choose a suitable scale and represent the data in a bar graph.
  7m 36s

• 9.    The table below shows the average rainfall in the first 6 months of the year in a certain country. Choose a suitable scale and draw a bar graph to represent the data.
  8m 57s

• 10.    A certain government bought the following types of food to help families affected by drought in the county. Using a suitable scale, represent the data using a bar graph.
  7m 45s

• 11.    To support families during the drought, the government donated bags of maize to 4 villages in a ward as shown in the bar graph below. a) How many bags did village N receive? b) What is the total number of bags that the government gave out? c) How many more bags did village N receive than village P?
  2m 59s

• 12.    During an environmental day, five clubs from a certain city planted tree seedlings. The bar graph below shows the number of tree seedlings each club planted. a) Which two clubs planted equal number of tree seedlings? b) How many more tree seedlings did Wema Club plant than Tendo Club? c) Which club planted the highest number of tree seedlings? d) How many tree seedlings did Mazao and Safi plant al
  4m 39s

• 13.    The table below shows the number of vehicles that passed through a certain junction. Draw a pie chart to represent the number of vehicles.
  6m 25s

• 14.    A trader packs tea leaves in packets. The table below shows the masses of the different numbers of packets. Represent the number of packets on a pie chart.
  5m 50s

• 15.    The table below shows the mass of goods a trader sold in a week. Represent the mass of the goods in a pie chart.
  7m 12s

• 16.    The pie chart below represents the number of animals on Tipis farm. He has a total of 720 animals on his farm. a) What angle represents the number of sheep? b) How many cows are on the farm? c) How many more goats than sheep are on the farm?
  4m 37s

• 17.    The pie chart on the right represents the population of a village in a sub-county. The number of girls is 300. a) What angle represents the number of girls? b) What is the number of boys, women and men in the village? c) How many more women than men are in the village? d) What is the population of the village?
  4m 59s

• 18.    The table below shows the cost in shillings of different masses of meat in a butchery. Using a suitable scale, represent the data on a line graph.
  6m 28s

• 19.    The table below shows the cost of different masses in kilograms of sugar as sold by a trader. Choose a suitable scale to represent the data in a line graph.
  5m 30s

• 20.    A learner measured changes in the length of a flag post’s shadow at different times. She recorded the lengths as shown in the table below. Using a suitable scale, represent the data in a line graph.
  6m 7s