Experiment with the inflatable globe in Bus Q600

In Week 8 we discussed confidence intervals for the population mean μ and the population proportion p. To illustrate the calculation of the point estimate for p and the corresponding confidence interval, the students participated in an experiment where they randomly picked points on an inflatable globe.

We did this for 30 times and in each section where the experiment was performed, we found that about 21 or 22 times water (lakes, oceans) was hit. This resulted in an estimate of about 70% which is very close to the true proportion of 70.8%.

Here is the video of this experiment (on YouTube) as it was performed in Section C02 (Thursday class).