spss for beginners - مواقع اعضاء هيئة التدريس | ksu...

Introduction to the SPSS Interface

Dr. Mohammed AlahmedPh.D. in Biostatisticsalahmed@ksu.edu.sa

(011) 4674108

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Contents

• SPSS interface: – Data view and Variable view

• How to enter data in SPSS• How to import external data into

SPSS• How to clean and edit data• How to get descriptive statistics

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SPSS interface

• Data view– The place to enter data– Columns: variables– Rows: records

• Variable view– The place to enter variables– List of all variables– Characteristics of all variables

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Enter data in SPSS directly

Example: Hospital-stay data

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Columns:

variables

Rows: cases

Under Data View

Enter Variables

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1. Click this Window

1. Click Variable View2. Type variable name

under Name column (AGE).

NOTE: Variable name can be 64 bytes long, and the first character must be a letter or one of the characters @, #, or $.

3. Type: Numeric, string, etc.

4. Label: description of variables.

2. Type variable

name3. Type:

numeric or string

4. Description of variable

Enter variables

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Based on your code book!

Enter cases

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Import data from Excel• Select File Open Data• Choose Excel as file type• Select the file you want to import• Then click Open

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Open Excel files in SPSS

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Continue

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Save this file

as SPSS data

Clean data after import data files

• Run cases summaries for all variables• Run frequency for qualitative variables and

Descriptives for quantitative variables • Check outputs to see if you have variables

with wrong values.• Check missing values and physical surveys

if you use paper surveys, and make sure they are real missing.

• Sometimes, you need to recode string variables into numeric variables

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cases summaries

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Basic Statistical Analysis

• Descriptive statistics:1. Find wrong entries2. Have basic knowledge about the

sample and targeted variables in a study

3. Summarize data.

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Analyze Descriptive statistics Frequency

Qualitative Variables

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Analyze Descriptive statistics Descriptives

Quantitative Variables

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Histogram Box-PlotAGE

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Duration of StayHistogram Box-Plot