AP CSP Data Analysis 3 - ANDREW BENYEOGOR | Biblioteka

1

What is a primary benefit of data cleaning in statistical analysis?

Enhances data visualization aesthetics

Reduces bias and improves accuracy of results

Speeds up computer processing time

Increases data storage capacity

1

Which aspect of data cleaning is most crucial for ensuring reliable analysis?

Handling missing values and incomplete records

Changing the font of data entries

Creating backup copies of the dataset

Renaming all variables

1

Data cleaning helps improve data quality by

Deleting all outliers automatically

Adding random values to fill gaps

Converting all numbers to text format

Identifying and correcting inconsistencies in the dataset

1

Which is one way in which number systems are abstract?

The same number can be represented by different number representations

A number system can be best represented by one number systems

Symbols cannot be used to add, subtract, multiply or divide them in their abstract form

They use constants

1

The process of removing corrupt data, incomplete data, verifying ranges (e.g you saw 13th grade in a k12 student record table, or someone date of birth is in the future) is called

1

What do you understand by the word data filtering?

1

The process of grouping your data into categories based on common features or values is called?

data filtering

data classifying

data cleaning

data mining

1

What is the information about the creation date, author of digital document / files on your computer called?

Metadata

Content

Context

Media Assets

1

What is the amount of data compression an algorithm can produce reliant upon?

A large file size

Several Patterns in the data

No repeating parts of the file being compressed

Small file size

1

Convert 215 in base 10 to its binary form

1

How can an organization begin the process of analyzing data?

By following an iterative development process

By establishing measurements the data should show

By developing hypothesis and questions to test

By checking to see if the data matches previously collected data

1

Convert the three letter word "AND" to binary

1

Meta data can be used to

Provide updates to the data

Sort the data

Brand the data

Help find and organize the data

3

A major telecom company decides to get all posts and comments on twitter within the past two years where their company name was in the tag or was mentioned with the post content. What kind of information can they get from these twitter data? List at least 3

1

What could be a reason to perform additional research on correlations found through data analysis

There may not be an cause-and-effect relationship between the correlation variables

A single source may not provide enough data for a conclusion

To understand the relationship between the variables

All of the above

1

When is sampling needed?

Sampling is used to store analog data

Sampling is used when converting digital data to analog data

Sampling is used when converting analog data to digital data

Sampling is used to provide an approximation to real world data