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SPSS ANALYSIS: Two Sample ttest ( Independent Samples) In a classroom setting, is there a difference in test results between students exposed to a standard method of teaching and those exposed to an experimental method of teaching? Problem: In recent years, there has been increased attention on style of teaching within the classroom. The question emerges: should teachers stick to the standard/traditional style of teaching in which the student is a passive learner of information, taking in information as it is delivered or should teachers adopt an experimenta|ontraditiona| style in which the student is thought of as an active part of the learning process, seeking out information and helping to identify their correct educational path. The current research sought to investigate this question further. Researchers investigated the abilities of 4th grade students after they were exposed to either a standard style of teaching or an experimental style of teaching. They were given a pretest before the teaching began and a posttest after its completion. The groups will be compared on the difference between these tests (posttest - pretest). The researchers are interested in a significant difference between the groups at the .05 alpha level. *Note: this is still an independent samples ttest because we are not comparing the pretest to the post-test results. We are instead comparing the test results of the kids who were exposed to one style of teaching with those who were exposed to another (2 independent groups). Hypotheses: In a brief paragraph, describe your impression of the question. If you had to make an educated guess, based on your own reallife experience, how do you think test results will differ by teaching method? State the null and alternative hypotheses (State these using the variable names; you do not need to use any numbers). Identify the Independent and Dependent variable. SPSS Analysis: We have some data from a hypothetical sample that includes 2 levels of teaching method (standard and experimental) and a variable named "Test Change" which is the difference between the post-test and the pre-test scores% Results: Identify the primary goal of this analysis. Report the t-value and p-value and discuss in words/paragraphs if the test results differ significantly by teaching style? How do you know? In which style did kids perform better? How do you know? Group Statistics Teaching method N Mean Std. Deviation Std. Error Mean Test Change Standard 1373 10.0532 3.29381 .08389 E_XErimamal 760 15.9276 3.31583 .12028 Independent Samples Test WTest for Equality of I-test for Equality of Variances Means F Sig. t of Test Change Equal variances assumed .212 .645 -39.353 2131 Equal variances not assumed -39.276 1557.520 Independent Samples Test t-Iestior Equality of Means Signicance Std. Error One-Sided p TwoSided p Mean Difference Difference Test Change Equal variances assumed <.od1 .14928 egual variances not assumed .14956 independent samples test t-test for equality of means condence interval the difference lower upper tesl change equal>