Question

 

(1) Identify the test

(2) Determine the obtained value (Enter the data and run the proper statistical test in SPSS)

(3) Properly write out the result given the information in the SPSS output

a) A mood inventory was given to determine if owning a pet affects mood. (α = 0.05)

        

Non-pet owners: 71, 68, 91, 65, 73, 81, 85

         pet owners: 86, 80, 88, 74, 82, 89, 85

b) A HS teacher hoped that the implementation of study buddy program resulted in an improvement in her students test scores. (α = 0.01)

                  Pre-program: 59, 61, 47, 60, 35, 80

                  Post-program: 71, 75, 55, 62, 50, 87

c) Phizex explored the effects of two treatments for baldness to see if either drug resulted in greater hair

growth than the control group. (α = 0.05)

                  Drug1: 12,   16,   11,   9,   12,   15

                  Drug2: 10,   13,   15,   8,   11,   9

                  Control: 8,   7,   8,   11,   9,   7

Answer 1

a) NULL HYPOTHESIS H0:

ALTERNATIVE HYPOTHESIS Ha:

(1) The test is independent t test
(2) The obtained value of t= -1.733

(3) Properly write out the result given the information in the SPSS output

P value= 0.109

Since P value >0.05 level of significance hence NOT significant.

Decision: DO NOT REJECT NULL HYPOTHESIS H0.

Conclusion: We don't have sufficient evidence to conclude that owing a pet effects mood.

b) NULL HYPOTHESIS H0:

ALTERNATIVE HYPOTHESIS Ha:

alpha=0.01

(1) The test used here is PAIRED t test
(2) The obtained value is -4.807
(3) P value= 0.005 . Since P value is SMALLER than the level of significance therefore SIGNIFICANT.

Decision: Reject H0

Conclusion: We have sufficient evidence to conclude that the program has significant effect.