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A sports day table has 18 runners. For each runner it records the name, the house, the age, the…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A sports day table has 18 runners. For each runner it records the name, the house, the age, the time for 100 m and the place.
- How many rows and how many columns does it have?
- How many facts does it hold?
- Two more runners join, and a column for the long jump is added. How many facts does it hold now?
Need a reminder? The key ideaShow
Data is kept in a table. Each row is one case, such as a student, and each column is one variable. The number of facts is rows times columns.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Rows and columns. rows, one for each runner, and columns.
Step 2. Facts. .
Step 3. After the changes. rows and columns, so facts.
Answer: facts; then facts.
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