Question

(1) A researcher conducts a study on the effects of amount of sleep on creativity. The creativity scores for four levels of sleep (2 hours, 4 hours, 6 hours, and 8 hours) are presented below:

            2 Hours of Sleep         4 Hours of Sleep         6 Hours of Sleep         8 Hours of Sleep

                        3                                  4                                  10                                10

                        5                                  7                                  11                                13

                        6                                  8                                  13                                10

                        4                                  3                                  9                                9

                        2                                  2                                  10                                10

As a researcher, you wish to know if the four sleep categories significantly (p < 0.05) differ with respect to their effect on creativity. Assume this data set meets all the conditions for parametric testing.

            (a) What is the appropriate null hypothesis for this situation? What is the alternative hypothesis?

(b) Identify and perform the most appropriate parametric procedure to test the null hypothesis,

       present your results, and draw your conclusion using a complete sentence.

(c) If you find a significant (p < 0.05) difference, perform the appropriate test to determine where the

      significant difference lies.

(2) Pretend that you have only the 4-hour group of data and the 6-hour group of data from problem 1. Also pretend that this data set does not meet all the conditions for parametric testing. Without using a parametric procedure, compare the two samples (4-hour and 6-hour samples) and test for a significant (p < 0.05) difference.

(a) What is the appropriate null hypothesis for this situation? What is the alternative hypothesis?

(b)Identify and perform the most appropriate procedure to test the null hypothesis, present your

      results, and draw your conclusion using a complete sentence.

Answer 1

A) NULL HYPOTHESIS H0:

ALTERNATIVE HYPOTHESIS Ha: All means are different.

b) ONE WAY ANOVA will be used to perform test . Above is the output from SPSS..

Since P value =0.000<0.05 therefore SIGNIFICANT. hence there is difference in mean scores for four level of sleeps.

c) Difference is due to 2hours vs 6 hours, 2 hours vs 8 hours 4 hours vs 6 hours , 4 hours vs 8 hours from post hoctable.

NOTE: WE ARE ALLOWED TO DO FIRST QUESTION . I HAVE DONE THE FIRST QUESTION . PLEASE REPOST SECOND QUESTION ALONG WITH THE DATA . THANK YOU