12EC1.1 Data Science - Data Sampling Quiz

Emilie is conducting a research project for her class.

How can she perform data sampling techniques?

• Only manually

• Only through surveys

• Manually or computerised

• Only through interviews

Answer explanation

Emilie can perform data sampling techniques either manually, such as selecting samples by hand, or through computerized methods, which can automate the process and improve efficiency.

Emilie is conducting a survey for a school project.

Why is data sampling considered cost-effective for her project?

• It requires more resources

• It saves time and resources

• It increases data complexity

• It eliminates data errors

Answer explanation

Data sampling is cost-effective for Emilie's project because it saves time and resources by allowing her to collect insights from a smaller group rather than surveying everyone, making the process more efficient.

Emilie is conducting research on animal behaviour in their natural habitat.

Which method is best for gathering data in a natural environment?

• Surveys

• Interviews

• Field Studies

• Laboratory Experiments

Answer explanation

Field studies are ideal for observing animal behavior in their natural habitat, allowing researchers to gather data in real-time without interference, unlike surveys, interviews, or laboratory experiments.

During a science project, Cie and Toby used sensors to collect data.

What type of data did the sensors collect in passive data collection?

• User activity data

• System transaction data

• Physical world data such as temperature and motion

• Chronological event data

Answer explanation

The sensors collected physical world data such as temperature and motion, which is typical in passive data collection. This type of data reflects environmental conditions rather than user or system activities.

During a science project, Emilie and Luke are collecting data using various sensors.

What kind of data is typically not collected by sensors?

• Temperature data

• User activity data

• Motion data

• Pressure data

Answer explanation

User activity data is typically not collected by sensors, as sensors are designed to measure physical phenomena like temperature, motion, and pressure, rather than tracking human behavior or activities.

Luke is conducting a study to understand people's natural behaviour in a park.

Which method involves collecting data without direct participant interaction?

• Surveys

• Experiments

• Observational studies

• Focus groups

Answer explanation

Observational studies involve collecting data by watching participants without direct interaction, making it ideal for understanding natural behavior in a park. Other methods like surveys and focus groups require participant engagement.

Luke is conducting a survey in a large city.

He decides to use Cluster Sampling.

What happens after selecting clusters?

• All individuals within the selected clusters are included in the sample.

• A random sample is drawn from each stratum.

• Individuals are selected based on ease of access.

• Quotas are set for each category.

Answer explanation

In cluster sampling, once clusters are selected, all individuals within those clusters are included in the sample. This method contrasts with stratified sampling, where random samples are drawn from each stratum.

Emilie is working on a project that involves computerised sampling methods.

Which aspect of these methods requires specialised knowledge?

• Increased Efficiency

• Scalability for Large Datasets

• Requires technical expertise

• Reduced Bias

Answer explanation

Computerised sampling methods require technical expertise to understand algorithms, data structures, and statistical principles, making this aspect crucial for effective implementation and analysis.

Zak is working on a research project and needs to analyse a large dataset.

What is a characteristic of computerised sampling methods that would benefit Zak?

• They are less accurate.

• They require less technical expertise.

• They are capable of handling larger datasets.

• They are more time-consuming.

Answer explanation

Computerized sampling methods can efficiently manage larger datasets, making them ideal for Zak's research project. This capability enhances data analysis without compromising accuracy, unlike less efficient methods.

During a school project on data collection, Emilie and Zak are discussing
which of the following is not a consideration for active data collection?

• Ethical considerations

• Data quality

• Participant engagement

• Data encryption

Answer explanation

Data encryption is primarily a security measure, not a direct consideration for active data collection. In contrast, ethical considerations, data quality, and participant engagement are essential factors in the data collection process.