Code.org Data 9 Exam

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

Which of the following could the photographer NOT do based on this metadata?

• 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

• Filter those taken in the afternoon

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

Due to a computer error, the Time metadata for all of the photographs is accidentally set to the same time of day. The other pieces of metadata and the data itself are not affected by the error. Which of the following is MOST likely to be the result of this problem?

• The photographer will not be able to find images taken on the same date

• The photographer will not be able to filter to photographs taken in the morning

• The photographer will not be able to view any of the images

• The photographer will not be able to sort images by the date they were taken

• The photographer will be more susceptible to data breahes.

• How Travel

  .

• Time Arrive

• How Long

• Biggest Challenges

Which column of data might be able to be visualized or analyzed but first would need to be cleaned?

• How Travel

• How Long

• Biggest Challenges

• Time Arrive

This question refers to the same table of data described above.

Which information could likely NOT be found with the data collected?

• Whether students who are new to the school take longer to get to school than other students

• The average time it takes students to get to school

• The most common travel mode students use to get to school

• Whether students who arrive to school later take longer to get to school

The chart above shows the frequency of searches for the words "pencil" and "pen" over a 5 year period. Which of the following is the best interpretation of the chart above?

• Pens are a better writing tool than pencils

• More people use pens than pencils

• The number of pens sold has increased slowly over time

• At any point in time there are typically more people searching for the word "pen" than "pencil"

• Pencil searches lead to pen searches

The mayor of a city is interested in learning what goals are most important for residents of the city. Members of her staff visit one of the many neighborhoods in the city and ask 20 residents to fill out a survey. The mayor is concerned that the survey may be biased and not accurately reflect the overall interests in her town. Which of the following strategies is MOST likely to address concerns about the data being biased or inaccurate

• Finding the same people surveyed previously to ask more detailed questions.

• Visiting the same neighborhood to collect more survey responses

• Visiting multiple new neighborhoods to collect more survey responses

• Having her staff collect the data using an app rather than paper surveys

• Adding more staff to verify that the responses were accurate

In which of the following situations would parallel systems MOST likely be used to help analyze data?

• Data analysis involving two or more columns of data

• Data analysis involving both string and numeric data

• Data analysis involving large datasets

• Data analysis that could result in two or more different types of visualizations

• Analysis completed by a team of coders

Which of the following conclusions is BEST supported by the scatter plot?

• Most dogs breeds have a maximum weight of 100 lbs or more

• Most dog breeds have a maximum life span of 10 or fewer years

• All dog breeds that weigh less than 50 pounds have a maximum lifespan of more than 10 years

• No dog breeds that weigh more than 150 pounds are expected to live more than 10 years.

• A longer max weight causes a lower max life span.

The chart below has a single point for every breed of dog. Each point indicates the maximum weight of that breed and the maximum number of years that breed of dog lives to.

Which of the following conclusions is BEST supported by the scatter plot?

• Dog breeds with a higher maximum weight tend to have shorter maximum lifespans

• All dog breeds tend to have the same average lifespan

• Dog breeds with a higher maximum weight tend to have longer maximum lifespans

• Older dogs weigh more than younger dogs

• Higher maximum weights cause a dog's life span to decrease.