Understanding Data Trends and Errors

Which of the following is a common data visualisation technique used to display the distribution of a dataset?

• Line Graph

• Histogram

• Pie Chart

• Scatter Plot

What is the primary purpose of identifying outliers in a dataset?

• To increase the dataset size

• To improve data accuracy

• To make data entry easier

• To reduce data redundancy

Which statistical analysis method is used to determine the relationship between two variables?

• Mean

• Median

• Correlation

• Mode

What is the first step in data cleaning best practices?

• Removing duplicates

• Validating data accuracy

• Identifying missing values

• Organising data

Which of the following is a trend in data mining?

• Manual data entry

• Predictive analytics

• Paper-based records

• Data hoarding

What is a common data entry error that can affect data quality?

• Consistent formatting

• Typographical errors

• Automated data capture

• Data validation

Which of the following can lead to misinterpreted data?

• Clear data visualisation

• Accurate data collection

• Ambiguous data labels

• Consistent data formatting

What is a potential consequence of biased data?

• Improved decision-making

• Accurate predictions

• Skewed results

• Enhanced data quality

Which of the following can result in inaccurate conclusions from data analysis?

• Comprehensive data collection

• Proper statistical methods

• Incomplete data

• Thorough data cleaning

Which data visualisation technique is best for showing changes over time?

• Bar Chart

• Line Graph

• Pie Chart

• Box Plot