Show Full/Clear Solutions for all the questions:

Chapter 7:

1)The standard p-value in hypothesis testing is.________________

2) At what p-value does the researcher reject the null hypothesis?

3) Please explain the concept of "power." Please include what it involves rejecting and in what cases (the information from one of the four boxes presented in class).

4) What is the alpha level for most statistical tests? How does alpha relate to Type I error?

5) 90 depressed children earn a hyperactivity score of 15 on the Beck Depression Inventory. The population mean for normally developing children is 9 (SD = 4). Is this sample's mean significantly different from the overall population's mean? USE Z TEST.

6) 50 anxious college students earn an anxiety score of 16 on the State-Trait Anxiety Inventory. The population mean for non-anxious college students is 12 (SD 8). Is this sample's mean significantly higher than the overall population mean? USE Z TEST.

7) What is Cohen's d' effect size for problem #14?