Chapter 17 Exam Review

Data can be used to do which of the following?

• Solve problems

• Find trends

• Draw conclusions

• All of these

Which of the following best defines "information"?

• The result of analyzing data to find patterns and facts

• The raw data input into an algorithm

• A description of an algorithm's logic

• All of these describe information

What is the difference between "correlation" and "cause"?

• A correlation tells you "where" an event occurs, and a cause tells you "when" the event started

• A correlation tells you "why" something happens, and a cause tells you "how often"

• A correlation tells you there "is" a connection or relationship, and a cause tells you "why" that connection exists

• These terms mean the same thing

What is metadata?

• A random sampling of a data set

• Information about data

• Conclusions drawn from data

• A term used to sound trendy

A data set is generated by having someone answer a 10-question survey. Which of the following is NOT an example of metadata about that survey?

• The answer to question 1

• The time the survey was given

• The age of the person surveyed

• The location of the person surveyed

Which of the following could be used to describe "messy" data?

• I only

• I & III

• II & III

• I, II, & III

Which of the following steps is part of cleaning messy data?

• Change the data to be uniform without changing the meaning

• Draw early conclusions to help guide later analysis

• Complete missing data with your best guess

• Create charts and graphs to help understand the data

If you create a survey that asks users what state they are from, what might cause your data to be messy?

• I & III

• I & II

• II & III

• I only

A researcher created a survey and collected this data. Which of the following CANNOT be determined by studying this data?

• The location of the survey participants

• The favorite show selected by the most participants

• The most popular streaming service among the people surveyed

• The average number of hours people overall spend watching streaming services

A researcher created a survey and collected the this data. Which of the following would need to be collected, in addition to the existing data, to answer the question:

When do users most often watch their favorite shows?

• The participants' least favorite streaming shows

• The time of day the survey was filled out by participants

• The time of day when participants watch streaming services

• The device the participants use to watch streaming shows