This is the most fascinating photo I have ever taken. I shot about 200 droplets from the water faucet for half an hour. This one shot really stunned me. What you see here is a non-edited jpeg camera file cropped out. The water thread was fully stretched giving perfect necking with the water droplet. This is the final instant of time where the droplet was still hanging. On the bubble you can see reflection images of the surrounding of my kitchen. I made history.
Sampling distribution of the means. From Jane Miller, Steve Dobbs textbook. Tough one.
Distribution of the mean. This could be a surprise question in the exam. No such type was ever set.