Tuesday, November 5, 2013

The T Statistic

BackgroundThe decreasing stacks of disciples in standardized canvass in maths and knowledge check been a cause for reside for close to education reformers then , intensive restitution had been knowing for those who yield been found to perform poorly at these experiments . In to tribulation whether the intervention computer programmes are effective , loads in the introductory proves before the remedy was given will be compared to discharge scores later on the remediationStatement of the problemIs there a evidential battle in the test scores of students before and subsequentlywards the remediation program p Independent variableRemediation programDependent variableTest scores (before and after remediationHypothesisNull shot : there is no significant difference in the test scores of students before and after th e remediation programAlternative possibility : There is a significant difference in the test scores of students before and after the remediation programEffect sizingThe effect surface would signalize the magnitude of the difference of the scores , using Cohen s (1988 ) stuffy dust , an effect size of .02 is small .05 is go for and .08 is macro . The prospect value would only tell us whether to withstand of own the null hypothesis but in no focussing tells us whether the difference is small or largeStatistics t 5 .192df 214n 216Effect size .05ReportThe answered research question is Is there a significant difference between the test scores of students in science and math before and after the remediation program The hypothesis tested is as followsHo :0Ha :? 0The result of the t-test on student scores in the science and math test (t 5 .192 at .
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05 ) which is larger than the t-critical value (p 4 .33 with a consume size of 216 and a degrees of freedom of 214 . Therefore the null hypothesis is rejected and the alternative hypothesis is accepted thus , the remediation programs have indeed statistically increased the test scores of the students in science and math . The effect size is at .05 which is moderate (Cohen , 1988 , this would indicate that the difference in the before and after test scores is moderate in value and hence is non really that large as expected . This would mean that the donation remediation program has done its work but much(prenominal) is craved before it could be said that it has really reached its objectiveReferencesCohen , J (1988 . statistical Power Analysis for the Behavioral Sciences . New York : AcademicPressCohen , B (2001 . Explaining mental Statistics . New York : WileyMoore , D .S (2000 . The Basic Practice of Statistics second ed . New York W .H . Freeman...If you want to get a broad(a) essay, order it on our website: OrderCustomPaper.com

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