Exploring Data Science Fundamentals

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

• Line graph

• Histogram

• Pie chart

• Scatter plot

What is the primary goal of machine learning?

• To create static models

• To enable computers to learn from data

• To replace human intelligence

• To store large amounts of data

Which of the following is a qualitative data collection method?

• Surveys

• Interviews

• Experiments

• Observations

In statistical analysis, what does the term "mean" refer to?

• The middle value in a dataset

• The most frequently occurring value

• The sum of all values divided by the number of values

• The difference between the highest and lowest values

Which of the following is a key concern in data ethics?

• Data storage capacity

• Data visualisation techniques

• Data privacy and consent

• Data processing speed

What is "big data" primarily characterised by?

• Small datasets

• High velocity, volume, and variety

• Low complexity

• Limited data sources

What is the purpose of a scatter plot in data visualisation?

• To show trends over time

• To compare parts of a whole

• To display relationships between two variables

• To show frequency distribution

Which of the following is a quantitative data collection method?

• Focus groups

• Case studies

• Surveys with closed-ended questions

• Ethnographic studies

In statistical analysis, what does the term "median" refer to?

• The average of all values

• The most frequently occurring value

• The middle value when data is ordered

• The range of the dataset

Which of the following is a potential risk associated with big data technologies?

• Increased data accuracy

• Enhanced data security

• Privacy breaches

• Reduced data storage costs