SHORT ANSWER.  Write the word or phrase that best completes each statement or answers the question.
1) Herpetologists (snake specialists) found that a certain species of reticulated python has an average length of 20.5 feet with a standard deviation of 2.3 feet. The scientists collect a random sample of 30 adult pythons and measure their lengths. In their sample the mean length was 19.5 feet long. One of the herpetologists fears that pollution might be affecting the natural growth of the pythons. Do you think this sample result is unusually small? Explain.	1)  _____________

1) We have a random sample of adult pythons drawn from a much larger population. With a sample size of 30, the CLT says that the approximate sampling model for sample means will be  A sample mean of only 19.5 feet is about 2.38 standard deviations below what we expect. The sample mean of 19.5 feet is unusually small.