Question: Go to artofstat.com, click on WebApps and open the Explore Coverage app.Change the tab on top of the graph to Confidence Interval for a Mean.

Go to artofstat.com, click on WebApps and open the Explore Coverage app.Change the tab on top of the graph to Confidence Interval for a Mean. Change the Population Distribution to Bell-shaped and use the default mean=50 and standard deviation=10.

Under "Choose confidence level (in %)" use the default 95, and under "Select sample size (n)" use the default of n=20. Under "Select how many samples (of size n) you want to draw from the population" start with just 1. Click on "Draw sample(s)" and note that a confidence interval appears under the population graph.

What does the green squarein the middle of the interval represent?

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