Alteryx Advanced - Sampling

The video tutorial covers various sampling techniques in Altrix, including Random Percent Sample and Create Samples tools. It explains how to handle imbalanced data using the Oversample Field tool and demonstrates the Select Records tool for data selection. The tutorial emphasizes the importance of sampling in data analysis and predictive modeling.

What is the primary purpose of sampling in statistical analysis?

• To ensure data privacy

• To eliminate the need for data analysis

• To provide statistical information by examining a few selected units

• To examine every unit in a population

Which tool in Altrix is used to generate a random sample of records?

• Create Samples Tool

• Oversample Field Tool

• Select Records Tool

• Random Percent Sample Tool

How can you ensure consistent output with the Random Percent Sample tool?

• By running the workflow multiple times

• By using a different tool

• By enabling the deterministic output option

• By using a larger data set

What is the function of the Create Samples tool in Altrix?

• To remove all records from a data set

• To split input records into two or three random samples

• To merge multiple data sets

• To create duplicates of data

In the Create Samples tool, what happens if the total percentage for estimation and validation is less than 100%?

• The records are duplicated

• The tool will not run

• The remaining records fall in the holdout sample

• The remaining records are discarded

What issue does the Oversample Field tool address in data sets?

• Data redundancy

• Data imbalance

• Data loss

• Data corruption

How does the Oversample Field tool achieve equal representation of data values?

• By duplicating minority class records

• By under-sampling the majority class

• By deleting all records

• By increasing the data set size

What is the primary use of the Select Records tool?

• To delete all records

• To create duplicates of records

• To merge data sets

• To return specified records and ranges of records

How can you specify a range of records in the Select Records tool?

• By using a single digit

• By using a range of numbers

• All of the above

• By using a combination of numeric ranges

What happens when you input a number followed by a '+' in the Select Records tool?

• It returns records from the specified number to the end

• It returns records from the start to the specified number

• It duplicates the specified records

• It deletes all records