Week 1

Question 7 In long data, separate columns contain the values and the context for the values, respectively. What does each column contain in wide data? A unique format A unique data variable A specific data type A specific constraint

A unique data variable

Question 2 Continuous data is measured and has a limited number of values. True or False

False

Question 3 A data analyst is working for a company that's about to launch a new product. The analyst needs to collect qualitative data from customers during the product launch. What is the most accurate and relevant method of data collection in this scenario? Second-party data results for a similar product Third-party observations of customers shopping in stores First-party customer interviews in focus groups First-party data collection using an online survey

First-party data collection using an online survey

Why is internal data considered more reliable and easier to collect than external data? Internal data circumvents privacy restrictions. Internal data has much larger sample sizes. Internal data lives within a company's own systems. Internal data comes from people you know.

Internal data lives within a company's own systems.

Question 3 Which of the following questions collect nominal qualitative data? Select all that apply. Did anyone recommend our restaurant to you today? How likely are you to recommend this restaurant to a friend? Is this your first time dining at this restaurant? Have you heard of our frequent diner program?

Is this your first time dining at this restaurant?

Which method of data-collection is most often used by scientists? Interviews Questionnaires Observations Surveys

Observations

Question 5 Which of the following is an example of structured data? Relational database Digital photo Audio file Video file

Relational database

If you have a short time frame for data collection and need an answer immediately, you would have to use historical data. True or False

True

Question 8 A data analyst is working in a spreadsheet application. They use Save As to change the file type from .XLS to .CSV. This is an example of a data transformation. True False

True

Question 6 Which of the following values are examples of a Boolean data type? Select all that apply. Yes or no The numbers 1 through 10 True or false One, two, or three

True or false Yes or no

Fill in the blank: Organizations such as the U.S. Centers for Disease Control (CDC) often use data collected from other organizations. Data gathered by hospitals, then collected by the CDC is an example of _____. third-party data second-party data first-party data multiple-party data

second-party data