Y12 EC Data Science Wk2 L2

Multiple Choice

The mayor of a city is interested in learning what goals are most important for residents of the city. Members of her staff visit one of the many neighborhoods in the city and ask 20 residents to fill out a survey. The mayor is concerned that the survey may be biased and not accurately reflect the overall interests in her town. Which of the following strategies is MOST likely to address concerns about the data being biased or inaccurate

• Finding the same people surveyed previously to ask more detailed questions.

• Visiting the same neighborhood to collect more survey responses

• Visiting multiple new neighborhoods to collect more survey responses

• Having her staff collect the data using an app rather than paper surveys

• Adding more staff to verify that the responses were accurate

Open Ended

What role do emoticons play in digital communication according to the text?

Open Ended

How do likes help in understanding the popularity of an item?

Multiple Select

What are the three forms of alternative data mentioned in the text that are used for collecting feedback?

• Likes

• Emoticons

• Memes

• Comments

Multiple Select

What are the potential biases to consider when interpreting alternative data from likes, emoticons, and memes?

• Selection bias

• Response bias

• Confirmation bias

• Sampling bias

Multiple Choice

The developers of a music-streaming application are updating the algorithm they use to recommend music to listeners. Which of the following strategies is LEAST likely to introduce bias into the application?

• Making recommendations based on listening data gathered from a random sample of users of the application

• Making recommendations based on the most frequently played songs on a local radio station

• Making recommendations based on the music tastes of the developers of the application

• Making recommendations based on a survey that is sent out to the 1,000 most active users of the application

Multiple Select

Which software allows users to like and react to posts, pages, and comments?

• Facebook

• Twitter

• Instagram

• Snapchat

Multiple Choice

What do likes, emoticons, and memes communicate as feedback?

• Likes show agreement or enjoyment

• Emoticons express feelings

• Memes convey humor or shared feelings

• All of the above

Multiple Choice

TRUE/FALSE: Emoticons were read sideways. :-)

• TRUE

• FALSE

Multiple Select

How do these forms of feedback differ from traditional written or verbal feedback?

• They are quicker and use images instead of long sentences.

• They can be less personal because they don't use your own words.

• They're more about immediate reactions than detailed thoughts.

• They are more detailed and comprehensive.

Multiple Select

In what contexts are likes, emoticons and memes commonly used as feedback?

• Social media posts

• Text messages

• Group chats

• Emails

Multiple Select

What are the three main factors that can impact the accuracy and reliability of data-driven decisions?

• Errors

• Uncertainty

• Limitations

• Assumptions

Multiple Choice

List and explain at least 3 data collection methods.

• 3. Random Selection: Choosing data randomly without any specific method.

• 1. Surveys: Gathering information from a sample of individuals through questionnaires or interviews. 2. Observations: Collecting data by watching and recording behaviors or events. 3. Interviews: Directly asking individuals or groups for information.

• 1. Guessing: Making assumptions about the data without any evidence.

• 2. Social Media: Collecting data from various social media platforms without permission.

Multiple Select

What are the three key factors that impact data sources?

• Sample size

• Data quality

• Data timeliness

• Data relevance

Multiple Choice

What is raw data?

• Data that has been processed

• Data that has not been processed

• Data that is easy to analyze

• Data that contains errors

Multiple Choice

What is processed data?

• Data that has not been cleaned

• Data that has been cleaned and transformed

• Data that is raw and unprocessed

• Data that is only numerical

Open Ended

Explain confirmation bias and its implications in research.

Multiple Choice

What is selection bias and what impact does it have on research results?

• It occurs when data is selected randomly

• It influences the results based on selection criteria

• It has no effect on the study's hypothesis

• It is a method to ensure accurate data

Multiple Choice

What is sampling bias and how can it affect research conclusions?

• It refers to random errors in data collection

• It leads to an unrepresentative sample

• It is a method to select data accurately

• It has no impact on research conclusions

Multiple Choice

What are some measures to minimize the impact of data quality bias?

• Conducting thorough data quality checks

• Using automated methods

• Ignoring data limitations

• Relying solely on self-reported data

Open Ended

Explain the difference between sampling bias and selection bias.

Open Ended

Describe a real-life example of how data bias could impact the validity of conclusions drawn from a dataset.

Multiple Choice

Imagine you are conducting a survey on a social media platform. What are some potential sources of bias in the data collected from this survey?

• Self-selection bias

• Response bias

• Underrepresentation of individuals not active on social media

• All of the above

Multiple Select

What measures can be taken to mitigate the impact of data bias in data collection and analysis?

• Using diverse data sources

• Conducting thorough data quality checks

• Employing statistical methods

• Ignoring data bias

Open Ended

Discuss the importance of using multiple data sources and conducting thorough data quality checks in minimising the impact of data bias.

Open Ended

How can the presence of data bias affect the confidence that stakeholders have in the data and the decisions based on it?

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident