Run Your Own Study

The microfinance program has no effect on any of these 20 outcomes. Your study draws one sample and tests every outcome at α = 0.05. Any “significant” result is a false rejection.

Because the program has no effect, each outcome’s z-score is a random draw from this null distribution: normal, centered at zero. A draw lands in a shaded tail (beyond ±1.96, so p < 0.05) 5% of the time.

Your study

–

of 20 outcomes statistically significant

Outcome	z (one draw from the null)	p value	Sig.?
Click “Run your study” to start.

Each row shows the null distribution from −4 to 4 and the dot where that outcome’s z-score landed.