CHYS 3P15 Lecture 4: CHYS 3P15 Lecture 4

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Assignment notes syntax = records of what you use. Then compare (use a t-test): used to compare. All of these are comparing two groups. Compares two means based on related data. E. g. , data from the same people measured at different times. When you have related data you want to compare to find means n= -1. Compares two means based on independent data. E. g. , data from different groups of people. Measuring chys 3p15 cohort this year vs last year n= -2. Dependent variable is placed in first column on spss. Compares the mean score of a sample to a known value. Usually, the known value is a population mean. E. g. , is ferrari achieving comparable lap times compared to the general f1 population n= -1. Assumptions of the t-test t-test s are parametric tests based on the normal distribution. In the paired sample t-test, this means that the sampling distribution of the differences between scores should be normal, not the scores themselves.

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