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CADA Final Review Assessment –Continuous assessment (10%) –Mini-project (20%) –Mid-test (20%) –Final Examination (50%) 40% from Part 1 & 2 60% from Part.

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Presentation on theme: "CADA Final Review Assessment –Continuous assessment (10%) –Mini-project (20%) –Mid-test (20%) –Final Examination (50%) 40% from Part 1 & 2 60% from Part."— Presentation transcript:

1 CADA Final Review Assessment –Continuous assessment (10%) –Mini-project (20%) –Mid-test (20%) –Final Examination (50%) 40% from Part 1 & 2 60% from Part 3 & 4

2 Main contents Getting Started with SPSS Describing Data Testing Hypothesis Examining Relationships

3 Part 1: Getting Started with SPSS Try to open the SPSS data file demo.sav. SPSS example files can be found C:\Program Files\SPSSInc\Statistics17\Samples\English This data file is a fictitious survey of several thousand people, containing basic demographic and consumer information. In Data View, columns represent variables, and rows represent cases (observations).

4 Construct a SPSS data file In Variable View, each row is a variable, and each column is an attribute that is associated with that variable. 1. By entering data directly2. By reading from other applications

5 Nominal (type of car owned) discrete (number of children) continuous (time of an exam) Scale (Quantitative) DATA ordinal Summary of Types of Variables Categorical Data

6 A simple frequency table The “missing” item tells us how many people did not select one of the two valid answers.

7 Pie charts

8 Bar chart

9 Histogram ( 直方图 ) It is a histogram for grouped numerical data in which the frequencies or percentages of each group of numerical data are represented as individual bars.

10 Stem-and-leaf plots completion time in hours Stem-and-Leaf Plot for agecat6= 45-49 Frequency Stem & Leaf 2.00 2. 99 13.00 3. 0022223344444 40.00 3. 555566777777788888888899999999999999999 35.00 4. 00000001111111122222233333333334444 21.00 4. 555666666777778888899 12.00 5. 000111111234 9.00 5. 667778889 4.00 6. 0011 4.00 Extremes (>=6.2) Stem width: 1.00 Each leaf: 1 case(s)

11 Basic statistics

12 Test Relationship between Scale & Categorical Variables Compare Means

13 Age, Education, and Internet Use Internet use by age (statistics for subgroups)

14 ANOVA Table The F test shows that there is a significant difference among average hours worked per week in five categories of education.

15 Multiple Comparison

16 Testing a single mean The standard error of the mean is The t -statistic The 95% confidence interval of the difference is

17 Testing a Hypothesis about Two related means

18

19 This problem is recommended to use the paired-samples t test.

20 Testing Two Independent Means

21 Output from t test for TV watching hours

22 Bar chart of completion time by Age and Gender

23 Two-way ANOVA

24 Relationship between Scale Variables

25 Linear regression model

26 The regression model becomes life expectancy=90-(0.70 x birthrate) That tells us that for an increase of 1 in birthrate, there is a decrease in life expectancy of 0.70 years.

27 ANOVA

28 Prediction and residuals

29 Checking for normality

30 Association between Categorical Variables

31 Crosstabulation Contingency Table by the use of time and education Here the percentages are column %

32 Gender Hand Preference LeftRight Female Observed = 12 Expected = 14.4 Observed = 108 Expected = 105.6 120 Male Observed = 24 Expected = 21.6 Observed = 156 Expected = 158.4 180 36264300 The Chi-Square Test Statistic The test statistic is:

33 Chi-square Test on Independence Since the p-value=0.00012<0.05, you reject the null hypothesis of independence. There is strong evidence of a relationship between primary reason for not returning and the hotel.


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