Normality using SPSS Statistics (Two or more ... - Datapott Analytics Interpret Spearman's rho Correlation in SPSS Validity test showed that non-Likert scale was 93% reliable, while the Likert-type scale had 89, 61, and 57% precision. t-tests, normality checks should be carried out separately for each group: put the appropriate grouping variable in the Factor List Reliability and Validity of Survey Scales Using the Likert scale (1 to 5) for survey, you are in the area of so-called non-parametric statistics with the Ordinal scale of data. All kinds of analyses within non-parametric statistics are distribution free. So the question about normality testing is meaningless. We want to examine the relationship between the English mark (1 to 5) and the level of stress (1 to 10). To begin the one sample t test, click on Analyze -> Compare Means -> One-Sample T Test. it is assumed that the amount of difference between 4 and 3 is the same as between 2 and 1, etc. In SPSS, we can specify the level of measurement as: scale (numeric data on an interval or ratio scale) ordinal. Scale