5.0.2. One-Sample Data Types
Three types of data can be analysed:
1) Any number of columns containing raw data can be selected.
2) A pair of columns, one containing data and the other frequency counts (frequency data).
3) A pair of columns, one containing class mid-points and the other frequencies (grouped data).
The following procedures have a Variable Selection Dialogue with three data types:
Statistics 1 → Descriptive Statistics →
Statistics 1 → Distribution Functions →
Ungrouped Raw Data: Any number of columns containing raw data can be selected by clicking on [Variable]. In this case, the program will perform the procedure on each selected column separately. The column lengths need not be equal. The graphical procedures with this type of data (see 5.3.3. Histogram) will plot only one column at a time.
Data with Frequency Counts: This option assumes that the first column contains data values and the second column contains frequencies corresponding to the values in the first column. First click on this data type option and then select two columns clicking on [Column 1] for the column of values and [Column 2] for the column of frequencies. The program keeps track of the value-frequency correspondence in all relevant procedures.
Grouped Data: It is assumed that the first column contains class midpoint values and the second column contains frequencies corresponding to these midpoints. As in the case of data with frequency counts, two columns must be selected by clicking on [Column 1] and [Column 2].