Unit Tableau C1

Question 1

Benefits of spas

Answer 1

1. User friendly: point and dick interface
2. Comprehensive statistical capabilities: wide range of statistical procedures
3. Dat a management_ robust management tools like import, merge

4 Data visualisation= a lot of graphical option like bar charts, histograms.
5. Automation y scripting: programming capabilities helps to automate repetitive fast.

Question 2

Limitations of sass

Answer 2

Cost
Programming is limited
Steep learning close
Memory limitation
Limited customniation

Question 3

Data view purpose

Answer 3

Data entry = type value
Data inspection - scroll
Data editing = modify insert ou delete
Case selection = can select subsets for analysis
Data trans formations = simple like sorting, transposing

Question 4

2 main windows of spot

Answer 4

l. Data view
a. Variable view

Question 5

Variable view purposes

Answer 5

Variable definition: define new variables
Variable properties = view and modify various prop of existing variables
Value labels= can assign descriptive value labels to numeric codes
Missing value handling: helps you to define have you want to handle missing values
Variable documentation
Variable alignment

Question 6

4 main type ofmeasurement scales to represent variable

Answer 6

1. Nominal scale = to categorise data without any inherent order or value eg. Gender, race
2. ordinal scale -to categorisedata which can he ranked ordered ag: educational level
   3.. Interval scale - which has equal - interval but tack zero o point ag: calcium, t
3. Ratio scale = equal interval and zero point ag: height weight.

Question 7

3 types of label in Saos

Answer 7

1. Variable label F descriptive name for each variable sg: instead of gender, use gender of participant
2. Value label = descriptive label to numeric codes eg: 1 for male, Z for female
3. Ale label = short title for entire data file

Question 8

Benefits of using label

Answer 8

. Improved data interpretation
Improved output readability
Reduced error
Better documentation

Question 9

How to perform reliability test

Answer 9

I prepare data
2. Analyse → scale → reliability analysis
3. Select variables
4. Select model= Alpha
5. Run the analysis’s click ok

Question 10

Normality of data

Answer 10

Degree to which the distribution of continuous variable follows normal distributions I Gaussian distribution or bells curve

Question 11

Normal distribution properties

Answer 11

1-bell shaped = highest it is mean
2 symmetry: symmetric around mean
3. Mean, median mode are equal
4. Area under curve is l

Question 12

Tests are classified into:

Answer 12

1. Parametric test = assumptions about distribution le normal distribution ag; t-test, analysis of variance, SPCC, regression analysis
2. Non parametric test ‘ = No assumption about distribution, data is ranked ago S chi square test.