Describe the process of calculating a standard deviation

Describe the process of calculating a standard deviation. Give a simple example of this calculation (such as calculating the standard deviation of the numbers 2,3,4,4,and 6). What would be the standard deviation if all of the sample values are the same?

Option 2

What does it mean for a result to be significantly significant at the 0.05 level? at the 0.01 level? Briefly tell how the idea of statistical significance helps us to decide whether to reject or not reject a null hypothesis.

Option 3

Find a salary data for a career you are considering. What are the mean and median salaries for this career? How do these salaries compare to those of other careers that interest you?