Question

A researcher is interested to see if there is an average difference in the age of male v. female CJ381 students. To examine this, she conducts a t-test. The SPSS output is shown below: Group Statistics sex N age in years 224 HL Mean 19.83 256 19.86 female male Std. Deviation 2.063 1.965 Std. Error Mean 138 123 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means sia Mean Difference 95% Confidence interval of the Difference Lower Upper -390 333 Std. Error Difference 184 df 478 Sig, (2-tailed) .877 .404 age in years 526 -.155 028 Equal variances assumed Equal variances not assumed - 154462.613 .878 -.028 185 -391 -334 5. Construct a one-tailed research hypothesis based on the research question above. (1 pt) 6. Write up the results of the t-test in full APA format. Remember, this means that you should include the following: - mean and standard deviation for each group the t statistic the df the observed p-value (remember, this is a one-tailed hypothesis test) indicate what the significance test tell you. (4 pts total) - -

Answer 1

5. The one-tailed hypothesis is Age of males is greater than the Age of females.

6.

The mean of male's age is 19.86 and the mean of female's age is 19.83. The standard of male's age is 1.965 and the mean of female's age is 2.063.

The t statistic is 0.526

The Degrees of freedom is 478.

The one-sided p-value is 0.877/2 = 0.4385.

Since the p-value is greater than the level of significance if considered 0.05, do not reject the null hypothesis that the Age of males and Age of females are the same hence we can conclude that the Age of males is not greater than the Age of females.

Good luck with your studies!!!