Data science

What is data cleaning?

• The process of detecting and correcting incorrect, incomplete, and irrelevant data in a database.

• Gathering and measuring data, which can include surveys and other collection tools.

• The process of verifying that data has been cleaned, corrected, and properly formatted.

• Presenting data in a visually appealing way.

What is the first step in data cleaning?

• fix errors

• remove duplicates

• handle missing data

• filter out outliers

Qualitative data is Data that is non-numeric resulting from open-ended collection.

• True

• False

Quantitative data uses...

What is web scraping?

• Using data to help determine what may happen in the future.

• Data collected and analyzed by another source.

• Collecting data that is publicly available on the internet, usually using an automated tool.

• Data that is collected by a person or business for their own use.

What form of data is used to help determine what may happen in the future.

• predictive data

• primary data

• secondary data

Open ended surveys consist of primary, and qualitative data

• True

• False

A way to see a lot of data in one place.

• open ended surveys

• web scraping

• data dashboard

• report

The collection of primary, quantitative data using numeric scales or ratings to return feedback that can be easily analyzed.

• close ended surveys

• open ended surveys

Patterns in the values of a set of data.

• data consistency

• data distribution

• data formatting

• data trends