Identify the four steps of a hypothesis test as presented in the chapter.

2-The psychology department is gradually changing its curriculum by increasing the number of online course offerings. To evaluate the effectiveness of this change, a random sample ofn= 36 students who registered for Introductory Psychology is placed in the online version of the course. At the end of the semester, all students take the same final exam. The average score for the sample is M= 76. For the general population of students taking the traditional lecture class, the final exam scores form a normal distribution with a mean of = 71.

a. If the final exam scores for the population have a standard deviation of = 12, does the sample provide enough evidence to conclude that the new online course is significantly different from the traditional class? Use a two-tailed test with = .05.

3 b. If the population standard deviation is = 18, is the sample sufficient to demonstrate a significant difference? Again, use a two-tailed test with = .05.

Question 4 Chapter 8 Review #10 a

A random sample is selected from a normal population with a mean of = 30 and a standard deviation of = 8. After a treatment is administered to the individuals in the sample, the sample mean is found to be M= 33.

a. If the sample consists of n= 16 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with= .05.

Question 5

b. If the sample consists ofn= 64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with = .05.