psy 211 statistics chapter 9 practice exam

1. Interval estimation is a post hoc technique. What does this mean? 2. Provide the formula for setting up the 95% confidence interval for the population mean. Use the appropriate critical value. 3. What is the critical value used to set up the 99% CI? 4. If a sample mean lies beyond +1.96 standard deviation units of the population mean, and we use this sample to set up a confidence interval, what is the probability that we will have included u in our range? 5. When randomly select a sample to set up the 99% CI, what is the probability before the fact that we will not include u in our range of values? 6. A research hypothesis states the expected relationship between (theoretical concepts, measurable events). 7. a) a)Provide an example of a null hypothesis. Use proper notation. b) b)Provide an example of a directional alternative using proper notation. 8. Draw a curve. Place the critical values for a one-tailed test at alpha=.05. Shade in the area of rejection. 9. Define a Type I error. What is the probability of making this kind of error? 10 Define the term power. What is the probability associated with power