{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

plugin-Chapter 11 Students(1)

plugin-Chapter 11 Students(1) - Displaying Distributions...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 11 Displaying Distributions with Graphs
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
HISTOGRAMS Pie charts and bar graphs display the distribution of categorical variables. How can we present the distribution of a quantitative variable? Quantitative variables usually take too many different values to create a separate group for each value. Alternatively, we group values that are close to each other into classes and present the distribution in a histogram.
Image of page 2
HOW TO MAKE A HISTOGRAM 1. Divide the range of the data into classes of equal width. Specify the classes precisely so that each individual falls into exactly one class. 2. Count the number of individuals in each class. 3. Draw the histogram: Mark the scale for the variable whose distributions you are displaying on the horizontal axis. The vertical axis contains the scale of counts. Each bar represents a class, the bar height is the class count. There is NO horizontal space between the bars unless a class is empty, which has a bar of height zero.
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
EXAMPLE 11.1 I constructed a histogram for the exam 1 scores from the fall semester in 2009: Exam 1 Score Number of students 50 to 54.9 2 55 to 59.9 0 60 to 64.9 4 65 to 69.9 10 70 to 74.9 14 75 to 79.9 17 80 to 84.9 19 85 to 89.9 22 90 to 94.9 20 95 to 100 16
Image of page 4
HISTOGRAM EXAMPLE 0 5 10 15 20 25 50 to 54.9 55 to 59.9 60 to 64.9 65 to 69.9 70 to 74.9 75 to 79.9 80 to 84.9 85 to 89.9 90 to 94.9 95 to 100 Number of Students Exam 1 Score Exam Performance
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern