Question

For the following, Use the five-step approach to hypothesis testing found on page 8-16. It states. You can use excel to compute the data or you can do it by hand. The YouTube videos provided in the links will walk you through the steps to complete the following problems.

1. State the hypothesis and identify the claim.

H0:

H1:

2. Find the critical value and determine what error level to use. For all the problems on this homework use an alpha level of .05 Determine if the test is directional or non-directional.
3. Compute the test Value for the student t-test
4. Make a decision to reject or fail to reject the null hypothesis.
5. Summarize the results

Problem #1 you have eight students who you randomly assign to a treatment group in a chemistry class that received a new method of instruction (Motivational Instruction). You randomly assign eight students from a chemistry class that did not receive the new method of instruction. You want to determine if a new method of instruction has an effect on final semester grades. You want to determine if the final grade scores are higher for the treatment group than they are for the group that did not receive the new instruction method. The data are as follows: using the five-step approach and the data provided complete the five steps. You will use a t-test for independent groups with an alpha level of .05 report the P value as well.

Group 1          Group 2

67                     88

72                     92

80                     78

57                     82

81                     97

71                    100

65                     90

74                     88

Bonus: Worth 10 extra points and must answer both parts to receive the bonus. What are the independent and dependent variables in this research project?

Answer 1