1. Mary measures the weights of five newly hatched pythons in ounces. John converts Marys measurements to grams. There are 28.35 grams in an ounce. Here are Marys results:

Python	1	2	3	4	5
Mary	1.13 oz	1.02 oz	1.23 oz	1.06 oz	1.16 oz

Calculate the mean and sample standard deviation of Marys measurements using the formula for each.

2. Mary measures the weights of five newly hatched pythons in ounces. John converts Marys measurements to grams. There are 28.35 grams in an ounce. Here are Marys results:

Python	1	2	3	4	5
Mary	1.13 oz	1.02 oz	1.23 oz	1.06 oz	1.16 oz

Show how to calculate the mean and sample standard deviation of Johns weights.

3. Use graphs and numerical summaries to help you describe how the following three datasets are similar and how they are different (think mean, median, range, and sample standard deviation): A: 5, 7, 9, 11, 13, 15, 17 B: 5, 6, 7, 11, 15, 16, 17 C: 5, 5, 5, 11, 17, 17, 17

4. The question below refers to decisions made by statisticians. Why might be s more commonly used thanas a measure of variability?