Test yourself with the skills you have acquired so far
Who uses SQL for which purpose?
Humans to work with data stored in a relational database
Database administrators to manage the data
Web-developers to code Websites
What is SQL used for?
To retrieve data from a non-database environment
To create and delete data in a database
For web shop payments
Which keywords can start a SQL statement?
SELECT
FROM
WHERE
Why is version control important?
Needed for selling the project
Develop a program with a team in a traceable process
Quick develop code
Who can use GitHub?
Only trained developers
Everyone who has bought it
Everyone with a Git account
What is a branch?
A copy of the original project
A specific project
A licensed company
How many windows does the working environment of R studio consist of?
None
3
4
R script allows you to:
Create a file where you can insert all the codes
Download a package
Create a project report
Do you use the command to create a pie chart in R?
barplot
pie
scatterplot
LDA is a statistical technique that allows for:
Both answers are true
Classification of data into groups
Predicting class membership
Assumptions required to apply LDA for predictive purposes are:
Both answers are true
equal variances-covariances across groups
Multivariate normality across groups
Surveys based on samples:
Allow for an exhaustive research in a population
Save resources if compared with a census-based survey
Both answers are true
Sample size is affected by:
Both answers are true
The sampling technique applied
The margin of error and the confidence level
Proportional allocation distributes sample size across strata basing on:
The mean value on each stratum
The size of each stratum
The variance in each stratum