Two T-Test Coursework Example

Two T-Test Name Institution Two T-Test Scenario 1 In the comparison of the pre to post test on measure one, the sample cases that were considered numbered 22, which fell under the recommended tests for T-Tests. The sample space had 21 degrees of freedom and resulted in a mean of 9.1364 for the pretest score, and 7.7727 for the posttest scores. The median scores were 8.5 and 7.0 for the pretest and posttest measures respectively. The descriptive statistics indicated that all the data input was valid with zero missing entities. Statistics Pretest score on first reading comprehension measure Posttest score on first reading comprehension measure N Valid 22 22 Missing 0 0 Mean 9.1364 7.7727 Median 8.5000 7.0000 Mode 6.00a 4.00 Std. Deviation 3.34230 3.92710 Variance 11.171 15.422 Skewness .004 .260 Std. Error of Skewness .491 .491 Kurtosis -1.450 -.975 Std. Error of Kurtosis .953 .953 Range 10.00 14.00 Minimum 4.00 1.00 Maximum 14.00 15.00 Sum 201.00 171.00 Percentiles 25 6.0000 4.0000 50 8.5000 7.0000 75 12.2500 11.2500 a. Multiple modes exist. The smallest value is shown The frequency distribution of the pre-tests and post-test scores were spread out, differently as shown in the histograms below. In the pretest scores, there were two distinct peaks, which did not follow the normal distribution curve but appeared to form two separate normal distribution curves. The posttest curve, on the other hand, appears to follow a normal distribution curve. In regards to the improvement of scores, there was a lower score in the post-test, considering the average score of the students. Accordingly, this suggested an overall improvement in the pre and post measure 1 assessment. One-Sample Test Test Value = 0 t df Sig. (2-tailed) Mean Difference 95% Confidence Interval of the Difference Lower Upper Pretest score on first reading comprehension measure 12.821 21 .000 9.13636 7.6545 10.6183 Posttest score on first reading comprehension measure ...