1. Calculate the 99% confidence interval of mean differences using the following data: df = 11, SE = 5.2, difference = 8.2
2. What is the difference between a Type 1 error and a Type 2 error?
3. When do we use the normal/Z distribution and when do we use the student t distribution?
4. What is statistical power?
5. What is the probability between the Z scores of -0.85 and 1.45?
6. In the normal distribution, what percent of observations are within 1 standard deviation of the mean? What percent are within 2 standard deviations of the mean?