1. In a box plot, in which quartile does 75% of the sorted data fall below?    Third quartile
2. Using the ggplot() method, which geometry function do you need to use to create a scatterplot?   geom_point()
3. What are trend charts used for?    To show the distribution of continuous variables.
4. What does the addTiles() function allow a user to do?    Allows the user to zoom in on the map.
5. What is the difference between a histogram and a bar chart?   A histogram displays the frequency of ordinal data, whereas a bar chart displays categorical data only.
6. What is the maximum number of bins for sliderInput()?   50
7. What type of chart is a scatter plot?  Correlation
8.  Which chart is a type of comparison chart?   Bar chart
9. Which chart is a type of trend chart?   Line Plot  
10. Which chart type shows the inner subdivision of a value among different categories or groups?   Part to whole charts   
11. Which data visualization displays information about the distribution of a population?   Histogram  
12. Which function adds a title to a fluidPage layout? titlepaneL()
13. Which function arranges elements in a layout with an area for navigation and a main area?        sidebarLayout()
14. Which function is used to add a shiny server component? tabsetPanel()
15. Which function is used to construct an initial empty UI when creating a Shiny app?    fluidPage()
16. Which function should you use if you want to add markers to display a specific location on a map that you draw?    addMarkers()
17. Which function will return an object that represents a world map?   leaflet()
18. Which graph type helps you visualize the count of categorical or grouped data?   Bar charts
19. Which method should be used to change the title of a plot? element_text()
20. which of the following is a true statement with regards to functions found in the shiny library                         fluidRow( creates a page layout which consists of rows that can include columns.
21. Which of the following is NOT a parameter to the varSelectInput() function?   The data set variable name
22. Which of the following is NOT a Shiny layout function?   sidebarPanel()
23. Which of the following is NOT the purpose of data visualization?   Preprocess and clean the data
24. Which package can you use for extra themes and color scales for ggplot2?   Ggthemes
25. Which package should be used to create a scatter plot?   ggplot2
26. Which statement best describes facets?     Facets subdivide an ordinal data set into panels based on a categorical or discrete variable.
27. Which statement best describes the varSelectInput() function?   Creates a list of values from a data set’s column names. 
28. Which statement is true about the interquartile range of a data set?    It contains the middle 50% of the sorted data.
29. Which statement is true regarding box plots?    It divides the data set into quartiles.
30. Which two methods can be used to create scatter plots?  qgplot(), ggplot()

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