Question

Problem Set 1: The independent-samples t test

Research Scenario: A learning psychologist is interested in comparing the success of two different mnemonics (memorization methods) on performance in a memory task. He assigns students to two groups, one which learns and uses a language-based rhyming memory technique, and one which learns and uses a visual “method of loci” spatial memory technique. He then administers a memory task to each group of students. The students are scored based on the percentage of correct answers.   

Using this table, enter the data into a new SPSS data file and run an independent-samples t test to test the claim that there is a difference in the percentage of correct answers between the two groups. Follow the directions below the table to complete the homework.

Language-Based	Spatially-based
93    77    89    87    78    62    67    90    95	83 89 72 95 76 63 99 84 93

Group Statistics
	Groups	N	Mean	Std. Deviation	Std. Error Mean
Scores	Language_Based	9	82.0000	11.69402	3.89801
	Spatially_Based	9	83.7778	11.73433	3.91144

Independent Samples Test
		Levene's Test for Equality of Variances		t-test for Equality of Means
		F	Sig.	t	df	Sig. (2-tailed)	Mean Difference	Std. Error Difference	95% Confidence Interval of the Difference
									Lower	Upper
Scores	Equal variances assumed	.051	.825	-.322	16	.752	-1.77778	5.52212	-13.48415	9.92860
	Equal variances not assumed			-.322	16.000	.752	-1.77778	5.52212	-13.48416	9.92861

1. Write an APA-style Results section based on your analysis. Include your boxplot as an APA-style figure as demonstrated in the APA writing presentation. (Results = 8 pts; Graph = 5 pts) (Just need this one answered please. Its urgent!)

Answer 1

We have conducted independent t-test to compare the means

we see that test statistic is -0.322 and p-value is 0.752

since p-value is less than significance level

we fail to reject the null hypothesis

we conclude that there is not sufficient evidence to support the claim that there is a difference in the percentage of correct answers between the two groups.