Foundation
21st March 2025
- 1Frequency Tables and Tally Charts
Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 2Time Series and Moving Averages
Find the 3-point moving average of 14, 18, 20.
- 3Grouped Frequency Tables
A grouped frequency table has intervals of unequal width, 0 <= x < 10 and 10 <= x < 40. Explain why this could make the table misleading when drawing a histogram.
- 4Pictograms
A pictogram key shows 1 symbol = 4 books. A row has 2 and a half symbols. How many books does the row represent?
- 5Probability Basics and the Probability Scale
A bag has 4 yellow and 6 white balls. What is P(picking a yellow ball)?
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