Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

Data Quality and Its Importance in Analysis

18 Questions

1 Views

Data Quality and Its Importance in Analysis

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a common issue with the DoB column in the given dataset?

The dates are invalid, such as 14/13/1986 (correct)

The dates are in the wrong format

The dates are missing for some records

The dates are not in chronological order

What is a potential consequence of having duplicate customer records?

Improved data quality

Increased storage costs

Excess inventory and sub-optimal procurement decisions (correct)

Faster data processing

What is the primary reason why data quality is important?

To ensure data is in a format ready for analysis

To avoid inaccurate data impacting business decisions (correct)

To ensure data is collected from the correct population

To identify duplicate records

What is an example of inconsistent data?

One customer with two different addresses Signup and view all the answers

What is an example of inaccurate data?

A customer address that is technically correct but incorrect for the business context Signup and view all the answers

What is the most common type of dirty data?

Incomplete data Signup and view all the answers

What is the primary characteristic of dirty data?

Data that takes away the data integrity of the entire dataset Signup and view all the answers

What can occur when data is collected using the wrong method?

Dirty data that takes away the data integrity Signup and view all the answers

What is a potential issue with the Country column in the given dataset?

Kuala Lumpur is listed as a country Signup and view all the answers

What is an example of invalid data?

Invalid IC number 6611-11-7042 Signup and view all the answers

What is the purpose of data validation?

To ensure field values are within a valid range Signup and view all the answers

What is essential for making informed decisions on how to handle incomplete or incorrect data?

Domain knowledge expert input Signup and view all the answers

What is the primary goal of data cleaning?

To address data quality issues and transform raw data for analysis Signup and view all the answers

What is the purpose of checking for consistency in data?

To check if the same data is kept in all the places that do or do not match Signup and view all the answers

What is the consequence of not cleaning data?

Invalid business decisions Signup and view all the answers

What is the purpose of data cleaning in relation to business intelligence?

To create standardized and uniform data sets Signup and view all the answers

What is the term for the process of preparing data for analysis by removing or modifying incorrect data?

Data cleaning Signup and view all the answers

Why is it important to ensure data is believable?

To ensure the analysis is valid and the result is reliable Signup and view all the answers