Independent-Samples t-Test with SPSS
Independent-Samples t-Test with SPSS
In this paper we will describe the basics of hypothesis testing using SPSS. For the purposes of this assignment, the two chosen variables were SEX and AGE. The proposed hypothesis is: On this sample, men and women have a different mean age.
When comparing mean age, the appropriate statistic is Student’s t. The assumptions for running a t-test are (Cressie & Whitford, 1986):
The data are continuous.
The data follows the normality probability distribution.
For a two-sample independent t-test with unequal variances, the individual variances on the two compared groups are statistically equal.
The two groups were sampled independently: there is no relationship between the individuals from a sample when compared with the other.
A random sampling method was used to collect the data.
Null hypothesis: Continue reading...