A student experiments with a model parachute and collects some results.
She drops the parachute from a height of 4 m three times and takes three results of the time taken.
The three results are:
3.25 s
3.00 s
3.08 s
What is the mean of the three results?
3.00 s
3.08 s
3.11 s
3.25 s
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A student wants to find out which heater produces the largest temperature rise.
Look at the results she collects and the calculations she makes.
| Heater | Starting temperature (°C) |
Finishing temperature (°C) |
Change in temperature (°C) |
| A | 18 | 28 | 20 |
| B | 18 | 36 | 16 |
| C | 18 | 44 | 26 |
| D | 18 | 51 | 23 |
Which heater has results that are correctly calculated?
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A student measures the time it takes for a bicycle to stop in an emergency.
She repeats the measurement to get three results.
The average time for her results is 2.72s .
The first two results are 2.66 s and 2.60 s.
What is the value of her third result?
2.63 s
2.66 s
2.72 s
2.90 s
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Four students measure the time it takes for a wave to travel the length of a ripple tank.
Each student collects three measurements of the time.
| Student | Time taken (s) |
||
| 1st measurement | 2nd measurement | 3rd measurement | |
| A | 2 | 2 | 1 |
| B | 2.1 | 2.1 | 2.4 |
| C | 2.1 | 2.0 | 2.2 |
| D | 2.11 | 2.49 | 2.23 |
Which student collected the most precise data?
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A student measures the time it takes for the sound from a firework to reach the observer.
She takes 3 measurements of the time taken for four different distances, A, B, C and D.
| Distance | Time taken (s) | ||
| 1st measurement |
2nd measurement |
3rd measurement |
|
| A | 2.16 | 2.19 | 2.17 |
| B | 1.99 | 2.02 | 1.97 |
| C | 1.80 | 1.81 | 1.89 |
| D | 1.69 | 1.68 | 1.71 |
Which distance A, B, C or D, has the largest range of values?
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