ONE SAMPLE T-TEST

Assignment 1: Change in Mood Following a Romantic Movie Clip

A researcher asks participants to watch a short romantic movieclip. The movie clip depicts a romantic scene ending with twolong-lost lovers embracing in a kiss. After the short romanticmovie clip, participants are asked to indicate how the romanticmovie clip has affected their mood on a bipolar scale ranging from-3 (much worse mood) to +3 (much better mood), with 0 indicating nochange in mood. The results are given below. It was assumed thatthe average participant would give a rating of 0 if there were nochange in mood. Test whether or not participants reported asignificant change in mood at a .05 level of significance using atwo­tailed test.

SCORES: -3, -3, -3, -3, -3, -3, -3, -3, -3,

-2, -2, -2, -2, -2, -2, -2, -2, -2,

2,

-1, -1, -1, -1, -1, -1, -1

0, 0, 0, 0, 0, 0, 0, 0, 0, 0

With regard to the SPSS exercise, answer the followingquestions:

Based on the SPSS output, state the following values:

Sample size, Sample mean, Sample standard deviation, Estimatedstandarderror                                                 

Based on the table shown in SPSS, state the following valuesassociated with the test statistic:

Mean difference, t obtained (t), Degrees offreedom (df), Significance (2-tailed)