A student investigates the statistical nature of radioactive decay. Using a Geiger-Müller tube, they measure the number of counts recorded from a weak radioactive source during seven consecutive 10-second intervals.
The results are shown in the table below:
| Interval | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Counts | 18 | 11 | 12 | 11 | 25 | 15 | 13 |
Which option gives the correct values for the mean, median, and mode of this dataset?
Mean = 151515, median = 131313, mode = 111111
Mean = 151515, median = 111111, mode = 131313
Mean = 131313, median = 151515, mode = 111111
Mean = 151515, median = 111111, mode = 111111
45 exam-style questions on OCR A A Level Biology Analysis. Each one has a worked solution and a mark scheme showing where the marks go.