Unit 6 Test Review

A photographer stores digital photographs on her computer. In this case the photographs are considered the data. Each photograph also includes multiple pieces of metadata including:

Date: The date the photograph was taken

Time: The time the photograph was taken

Location: The location where the photograph was taken

Device: Which camera the photo was taken with

Select all of the following the photographer CAN do with the data.

• Filter photos to those taken in the last week

• Filter photos to those taken in a particular country

• Filter photos to those taken of buildings

• Filter photos to those taken with her favorite camera

For the same dataset (photos), which of these problems would most likely happen if there was a glitch that caused the DATE of all photos to be the same?

• Couldn't view any photos

• Couldn't sort photos by date

• Couldn't filter to photos taken before 12 noon

• Couldn't email the photos to anyone

Which of these, if true about a column of data, would make it most difficult to visualize with any type of chart?

• If the data is all numbers

• If the data is all text

• If the data is all unique

• If the data is not entered consistently (2 vs "two", "February" vs "Feb".)

Which of these, if true about a column of data, would make it most difficult to visualize with a bar chart or histogram?

• If the data is all numbers

• If the data is all text

• If the data is all unique

True or False: some questions about the data may not be able to be answered depending on the type of data that is in the table.

• True
• False

Correlation does not equal

When we say "correlation does not equal causation" we mean that just because two charts or graphs look similar, that does NOT mean that they have anything to do with each other.

• True

• False

Answer explanation

Similarities in patterns does not mean that "this" thing caused "that" thing.

True or False: A dataset with inconsistent data entries (e.g., '2' vs 'two') can lead to inaccurate analysis results.

• True

• False

Which of the following scenarios would make it difficult to create any type of chart from a column of data?

• If the data is all numbers

• If the data is all text

• If the data is all unique

• If the data has many missing values

What could be a potential issue if all entries in a 'Time' column of a dataset of Concert Events were the same due to a system error?

• Couldn't calculate the number of attendees of an event.

• Couldn't sort entries by time

• Couldn't filter entries based on a specific time range

• Couldn't export the dataset to a CSV file