Question

QUESTION 1 "Look at the SPSS output below. Given a two-tailed test and an alpha of 0.01, what would the appropriate APA-style phrase be?" Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means sig Mean Difference Std. Error Difference 95% Confidence Interval of the Mean Lower Upper sig (2-tailed) TAPSPEED 319 582 -2.845 13 .014 -14.00 4.92 -24.63 -3.37 Equal variances assumed Equal variances not assumed -2.927 11.865 013 -14.00 4.78 -24.44 -3.56 O "t (13) = 2.845, p < 0.01" O "t (13) = 0.582, p <0.01" O "t (13) = -2.845, p > 0.01" O "t (13) = 2.845, p > 0.01" O None of the available answers

Answer 1

Answer Date: 30/09/2019 To test the hypothesis is that there is a difference in mean speed between two population means at 5% significance level. The null and alternative hypothesis is, H:41 = 42 H2:41 H2 The t-test statistics is, From the SPSS output, the t-test statistics is 1-2.845. The p-value for this test is, From the SPSS output, the p-value for this test is 0.014). Decision

The conclusion is that p-value in this context is higher than 0.01 which is 0.014, so the null hypothesis is not rejected at 1% level of significance. There is insufficient evidence to indicate that there is a difference in mean speed between two population means. The result is not statistically significant. The answer option is 3).