Show your R work (both your input and your output) for each question below. You may find Section 22.1 in the reading useful.
Mean and Standard Deviation
Suppose you have the following data:
7, 9, 4, 12, 15, 13
- Compute the mean (write a sentence with your answer).
- Compute the standard deviation (write a sentence with your answer).
- Compute the p-value assuming you computed t=5.678, df=13, and Ha is a “greater than”. Show your R code and a graphic.
- Make a decision about μ if α=0.01.
Types of Variability
Describe the difference between natural and sampling variability.