A student releases a toy car from the top of a ramp 2.50 m2.50\text{ m}2.50 m long. Her classmate measures the time taken for the car to reach the bottom of the ramp.
Suggest the equipment used to measure:
They record their results in the table below:
| Attempt | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Time taken (s) | 1.56 | 1.42 | 1.60 | 1.42 | 1.50 |
Use the data in the table to calculate the mean, median, and mode of their results.
The results are not very precise. Explain how you can tell from the data in the table.
Suggest a possible source of error in the experimental method and how it could be improved.