And in anticipation of the Dune remake this December:

Biologists working for the House Atreides found that a certain variety of sandworms have an average length of 20.5 feet with a standard deviation of 2.2 feet. A group of biologists collect a random sample of 40 adult sandworms and measure their lengths. In their sample the mean length was 19.6 feet long.

What is the standard deviation of this sampling distribution? Round to 2 decimal places.

Using the information in the last question:

One of the biologists fear that pollution caused by the House Harkonnen might be affecting the natural growth of the sandworms, limiting the production of Spice. Do you think this sample result is unusually small?

Explain AKA show your work and make a decision.