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Example SPSS

Example SPSS. Basic Medical Statistics Course October 2010 Wilma Heemsbergen. Windows in SPSS. For each data set: (>1 possible): Data view Variable view Furthermore, a syntax window can be opened Open windows are shown in the tab “Windows” New windows can be opened: file – new

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Example SPSS

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  1. Example SPSS Basic Medical Statistics Course October 2010 Wilma Heemsbergen

  2. Windows in SPSS • For each data set: (>1 possible): • Data view • Variable view • Furthermore, a syntax window can be opened • Open windows are shown in the tab “Windows” • New windows can be opened: file – new • Data, output, syntax can be saved in separate files

  3. Import Data Sets in SPSS Using the “paste” button, the corresponding syntax is pasted (ready to run). (*.dbf, *.xls, *txt,/…)

  4. Get data Menu: file – open - data Use the “paste” button to get the syntax in the syntax window It is also possible to start with opening a syntax file, which will read / open the data (without using the menu). To run: (select and) hit the run button. GET FILE='U:\data_statcursus\trial_rt.sav'. DATASET NAME DataSet1 WINDOW=FRONT.

  5. Compute Menu: transform - compute DATASET ACTIVATE DataSet1. COMPUTE duur_rt=tend - tstart. EXECUTE.

  6. Reports, describing data

  7. Displaying data

  8. Histogram Menu: graphs - legacy dialogs - histogram GRAPH /HISTOGRAM=duur_rt.

  9. Descriptives Menu: analyse - descriptive statistics - descriptives DESCRIPTIVES VARIABLES=age /STATISTICS=MEAN STDDEV MIN MAX.

  10. Recode Menu: transform - recode RECODE age (45 thru 69.99=0) (70 thru 90=1) INTO age70. EXECUTE.

  11. Split file / selection Menu: data - split file data - select cases

  12. SORT CASES BY arm. SPLIT FILE SEPARATE BY arm. COMPUTE filter_$=(arm=1). VARIABLE LABEL filter_$ 'arm=1 (FILTER)'. VALUE LABELS filter_$ 0 'Not Selected' 1 'Selected'. FORMAT filter_$ (f1.0). FILTER BY filter_$. EXECUTE.

  13. There is a possibility to save a subset of the variables: “save as”, option “variables”

  14. Try the following to practice with SPSS: • (data set and syntax file are available at website) • Read the file “trial_rt”, using menu. Paste the syntax. • Compute a new variable (save the syntax). • Generate a frequency table, a pie chart, a cross tab, using: the menu / the paste button / the syntax window. • Generate a frequency table for each rand arm seperately, using the options “split file” and “select”. • Save file: trial_rt_extended as an SPSS file. • Save a subset of variables (trial_rt_subset) • Save output: output_trial_rt. • Save syntax: syntax_trial_rt_extended. • Open the database again, using your syntax • Save file as a *.txt file or an *.xls file and try to read it again by importing the data set.

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