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Is there a significant difference between age groups in math achievement? 1. Yes, p < .05 2. Yes, p < .01 3. Yes, p < .001   4. Yes, p < .000   5. No, p > .05

Is there a significant difference between age groups in math achievement? 1. Yes, p < .05 2. Yes, p < .01 3. Yes, p < .001   4. Yes, p < .000   5. No, p > .05

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Is there a significant difference between age groups in math achievement?

1. Yes, p < .05

2. Yes, p < .01

3. Yes, p < .001
 
4. Yes, p < .000
 
5. No, p > .05
Group Statistics Std. Error Age in Years N Mean Std. Deviation Mean Math Achievement Lower than 13 556 50.7216 12.10574 .51340 Higher than 14 12.51362 .59454 443 50.9457 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Confidence Interval of the Difference Significance Mean Std. Error Sig. t df One-Sided p Two-Sided p Difference Difference Lower Upper Math Achievement Equal variances .671 .413 -.286 997 .387 .775 -.22410 .78259 -1.75981 1.31160 assumed Equal variances not assumed -.285 933.546 .388 .775 -.22410 .78553 -1.76571 1.31750 Independent Samples Effect Sizes 95% Confidence Interval Point Estimate Standardizer Lower Upper Math Achievement Cohen's d 12.28823 -.018 -.143 .107 Hedges' correction 12.29749 -.018 -.143 .107 Glass's delta 12.51362 -.018 -143 .107 a. The denominator used in estimating the effect sizes. Cohen's d uses the pooled standard deviation. Hedges' correction uses the pooled standard deviation, plus a correction factor. Glass's delta uses the sample standard deviation of the control group.
Transcribed Image Text:Group Statistics Std. Error Age in Years N Mean Std. Deviation Mean Math Achievement Lower than 13 556 50.7216 12.10574 .51340 Higher than 14 12.51362 .59454 443 50.9457 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Confidence Interval of the Difference Significance Mean Std. Error Sig. t df One-Sided p Two-Sided p Difference Difference Lower Upper Math Achievement Equal variances .671 .413 -.286 997 .387 .775 -.22410 .78259 -1.75981 1.31160 assumed Equal variances not assumed -.285 933.546 .388 .775 -.22410 .78553 -1.76571 1.31750 Independent Samples Effect Sizes 95% Confidence Interval Point Estimate Standardizer Lower Upper Math Achievement Cohen's d 12.28823 -.018 -.143 .107 Hedges' correction 12.29749 -.018 -.143 .107 Glass's delta 12.51362 -.018 -143 .107 a. The denominator used in estimating the effect sizes. Cohen's d uses the pooled standard deviation. Hedges' correction uses the pooled standard deviation, plus a correction factor. Glass's delta uses the sample standard deviation of the control group.
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