2.3 Extracting Information from Data

An online survey collected the following data from the people who participated.

·         The age of the person

·         The person’s favorite musical artist

·         The city in which the person lives

Which of the following could NOT be determined using only the data collected in the survey?

• The city where a particular musical artist is most popular

• The average age of the people who like a particular musical artist

• The most popular musical artist among people of a certain age-range

• The city in which a particular musical artist sold the most albums

A shopping website collected data from some of its customers and stored the following information in a database.

· The name of the customer

· The age of the customer

· The Date of the purchase

· The amount of the purchase

Which of the following can be determined using only the information in the database?

• The item that was purchased most often on a particular date

• The customer who spent the most money on a particular date

• The average age of a customer who bought a particular item

• The city where the most customers live

Which of the following are likely to be part of the metadata for a video file containing a movie?

i. The title of the movie

ii. The soundtrack for the movie

iii. The year the movie was filmed

• ii only

• i and ii only

• i and iii only

• i, ii and iii

Which of the following statements about metadata are true?

• Metadata are unrelated to the primary data.

• Metadata can be used to organize the primary data.

• Metadata give information about the primary data.

• Deleting metadata will also destroy the primary data.

Scientist conducting a geological survey of an area collected the following data.

·  Location

·  Elevation

·  Temperature

·  Soil Type

Which of the following could NOT be determined using only the information in these data?

• The average temperature for a certain soil type

• Whether a certain soil type is more common at a certain elevation

• What the most common soil type is for a certain location

• Which temperature range has the highest moisture level

Given the data in the graph above, which person would you expect to have the highest score on level 6?

• Angela

• Bob

• Charles

• Donald

Which of the following graph most likely shows a correlation between the two variables?

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