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TASMathematics ApplicationsQuick questions
Unit 3
Quick questions on Two-Way Frequency Tables - TCE Mathematics Applications (Tasmania)
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is reading the table?Show answer
The cells inside the table are the joint frequencies. The totals down the right edge and along the bottom are the marginal frequencies, and the single number in the bottom-right corner is the grand total. Always check that the row totals and the column totals each add up to the grand total before going further.
What are choosing the right percentages?Show answer
The percentage direction must match the question. If sex is the explanatory variable and you want to know how drink preference depends on sex, calculate the percentages within each sex (so each sex column adds to 100 percent). Calculating the percentages the other way around answers a different question and usually hides the pattern you were asked about.
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