In: Statistics and Probability
Ball Drop Experiment
4. You have a class of 20 students who were conducting the ball drop experiment. The data for one student, Fernando, is given below. He noticed that his experimental values to not exactly match the expected (calculated) values. He is very concerned that he did not do the experiment correctly and is upset.
Distance (cm) |
Experimental time (s) |
SE (s) |
Expected time (s) |
20 |
0.21 |
0.10 |
0.202 |
40 |
0.38 |
0.07 |
0.286 |
60 |
0.45 |
0.04 |
0.350 |
80 |
0.38 |
0.09 |
0.404 |
100 |
0.39 |
0.11 |
0.452 |
Calculate a χ2 score for Fernando’s data.
What can you tell Fernando about his data? Should this make him feel better?
Maria does a chi-square calculation and gets a p-value of 0.03. She is very proud that her p-value is the lowest in the class. What can you tell Maria about her data?