In the chapter, we ex amined the difference between white and black students in
ID: 2947937 • Letter: I
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In the chapter, we ex amined the difference between white and black students in the timing ey first tried cigarettes . In this SPSS output, we examine the grade when MTE or waehire and black students first tried alcohol. Present Step 5 (final decision) for these data. 2014 w Asume alpha .05, two-tailed test. est Output for RACE and NGradeAlcohol Group Statistics RACE 2014 RACE--B/W/H F1234 Std Mean Deviation Std. Error Mean radelcohoi New Grade coho 1 BLACK:(1) 2 WHITE:(2) 49 7.0408 224 7.8125 1.70733 24390 11160 1.67027 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% confidence interv Sig. (2- tailed) Mean the Difference Std. Error Difference Difference Sig. df Lower adcohol Equal variances New Grade assumed Up 271 -2.877 69.546 .009 925-2.918 -1.2923 004 .77168 26446 Equal variances not assumed .005 -.77168 268221.30670 search 1Explanation / Answer
The null hypothesis, there is no significant difference in the variance time they first tried alcohol between black and white. An alternative hypothesis, there is a significant difference in the variance time the first tried alcohol between black and white. With (F=.009, p>5%),I fail to reject the null hypothesis at 5% level of significance and conclude that there is no significant difference in the variance time the first tried alcohol between black and white. Hence I should use T test for independent samples with equal variances assumed.
Null hypothesis, there is no significant difference in the average time they first tried alcohol between black and white. v/s Alternative hypothesis, there is a significant difference in the average time the first tried alcohol between black and white. With (t(271) =-2.918, p<5%),I reject the null hypothesis at 5% level of significance and conclude that there is a significant difference in the average time the first tried alcohol between black and white.
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