Quick note for SPSS users: To get SPSS to run the analysis in the correct \"dire
ID: 2946543 • Letter: Q
Question
Quick note for SPSS users: To get SPSS to run the analysis in the correct "direction" from the Analyze > Compare Means >Paired-Samples T Test... protocol, please enter the after variable first, and the before variable second. (SPSS analyzes using first variable minus second variable.) You wish to test the following claim (Ha) at a significance level of a -0.001. For the context of this problem, 2 where the first data set represents a pre-test and the second data set represents a post-test. You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: pre-test post-test 30.8 57.1 61.1 55.1 74 61.7 61.6 44.5 25.8 11.7 73.3 5.9 11.4 36.5 26.1 49.4 18.5 29.6 55.4 24.1 72.8 32.5 63.5 41 22.3 80 36.9 24.4 34.1 63.2 26.3 26.3 28.9 36.1 55.1 45.1 50.7 37.7 60.5 59.9 57.5 57.1 34.6 39.2 56.3 What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic What is the p-value for this sample? (Report answer accurate to four decimal places.) p-valueExplanation / Answer
Before after.
Its paired t test
In excdl go to Data Analysis> Paired t test
test statistic: -2.225
p value=0.0183
t-Test: Paired Two Sample for Means posttest pretest Mean 34.10435 45.24347826 Variance 1012.972 185.6734783 Observations 23 23 Pearson Correlation 0.717543 Hypothesized Mean Difference 0 df 22 t Stat -2.22537 P(T<=t) one-tail 0.018311 t Critical one-tail 3.504992 P(T<=t) two-tail 0.036622 t Critical two-tail 3.792131Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.