Printable worksheet ยท 3 of 4
Grouping can lose exact detail - Paper 3
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Grouped times in minutes: 0 <= t < 10 has frequency 2; 10 <= t < 20 has frequency 6. Exact individual times are not supplied. Use interval midpoints 5 and 15 to estimate the mean. Frequency is a count, not a time measurement.
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