1. A researcher has a sample of 91 doctors who worked in a war zone. If she wants to assess the sample for PTSD symptoms using a scale and the standard error of the mean is 2.7, then the standard deviation will be:

2. Last year, Dr. Mathew obtained the following sample of heart rates (BPM) for students writing their test #1. The date are summarized below:

91, 79, 80, 91, 90, 88, 61, 78, 62, 93, 79, 66

What is the mean heart rate?

What is the sum of all z scores within a given distribution?

3. Lyla measured the heart rates (in bpm) for 9 of her patients. Calculate the standard deviation, by hand, using the following heart rate data: 103.4, 55.7, 104.9, 105, 107.4, 84.6, 80, 114.4, 2.1

4. A set of scores has SS = 210 and variance of 10. If the scores are a sample, the sample size n is ____and if the scores are a population, the population size N is ______

5. A sample consists of n = 18 scores. How many scores would be used to calculate the range?

6. A clinic manager is examining patient's satisfaction with the care they received from the physiotherapists, satisfaction is rated 1 to 5 for 'very satisfied', 'satisfied', 'neutral' 'dissatisfied', ;very dissatisfied'. This variable measured on the following scale:

7. Being hypertensive and not having high blood pressure are examples of mutually exclusive events.