3.1.4.Weekly challenge 1 - sj50179/Google-Data-Analytics-Professional-Certificate GitHub Wiki

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Question 1

A data analyst at a book publisher is working on an urgent report for executives. They are using only historical data. What is the most likely reason for choosing to analyze only historical data?

  • The data is unknown
  • The data is constantly changing
  • The project has a very short time frame
  • There is plenty of time to research historical data

Correct. The most likely reason for choosing to analyze only historical data is that a project has a very short time frame.

Question 2

Which of the following is an example of continuous data?

  • Leading actors in movie
  • Box office returns
  • Movie budget
  • Movie run time

Correct. Movie run time is an example of continuous data.

Question 3

Which of the following questions collect nominal qualitative data? Select all that apply.

  • 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?
  • Did anyone recommend our restaurant to you today?

Correct. “Did anyone recommend our restaurant to you today?”, “Have you heard of our frequent diner program?”, and “Is this your first time dining at this restaurant?” are questions that collect nominal qualitative data.

Question 4

Which of the following is a benefit of internal data?

  • Internal data is more reliable and easier to collect.
  • Internal data is less vulnerable to biased collection.
  • Internal data is less likely to need cleaning.
  • Internal data is the only data relevant to the problem.

Correct. A benefit of internal data is that it’s more reliable and easier to collect than external data.

Question 5

Which of the following is an example of structured data?

  • Audio file
  • Relational database
  • Digital photo
  • Video file

Correct. A relational database is an example of structured data.

Question 6

Which of the following values are examples of a Boolean data type? Select all that apply.

  • Yes or no
  • One, two, or three
  • Yes, no, or unsure
  • True or false

Correct. True or false and yes or no are examples of a Boolean data type.

Question 7

The following is a selection from a spreadsheet:

Name Attribute Value
Agnes Shipton Age 44
Agnes Shipton Occupation Entrepreneur
Henry Sing Age 36
Henry Sing Occupation Editor

What kind of data format does it contain?

  • Long
  • Narrow
  • Wide
  • Short

Correct. The selection from the spreadsheet contains long data.

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

Correct. A data analyst using Save As to change a file type from .XLS to .CSV is an example of a data transformation.