Without some correction, the percentage of agreement between two observers will tend to overestimate the true level of inter-rater reliability

With a single-sample t ratio, the null hypothesis states that

a. the sample mean could readily be part of the same distribution whose overall mean is already known. b. the sample mean in all likelihood could not be part of the same distribution whose overall mean is already known c. the sample mean and the population mean are significantly different values d. none of these, since the null hypothesis always assumes that at least two sample means have been obtained

Design an experiment that will examine the question, "Who will learn more about psychology, those students enrolled in a traditional course or those enrolled in a distance learning course?" Be sure to identify • the independent and dependent variables; • any confounding variables that might need to be controlled; and • your control and treatment groups. Also be sure to explain how you will

measure the dependent variable What will be an ideal response?