Below in the table are data from training 24 randomly chosen airport security guards. In this study, these participants

  1. Below in the table are data from training 24 randomly chosen airport security guards. In this study, these participants were asked to identify security risks. The researcher recorded how many security risks they identified. Assume this data reflects a sample. Calculate the mean, variance, and standard deviation for this set of scores. Explain the difference between the standard deviation of these scores (a sample) and the standard deviation scores of a population (as indicated in Problem #3). Don’t forget units.

 

Risks Identified
9 13 12 10 4 15 15 14
12 29 5 8 8 14 12 13
10 10 3 7 16 14 13 10