As you know from our discussion in class, I fully acknowledge that I was not able to teach you about Histograms prior to giving out the test, yet they are on the assignment. As I said in class, I want you to do your best on that question, using the notes, examples and information that I provide in this post. I will also give you a few minutes in class tomorrow to further review the concept of a Histogram. I will very likely give partial credit and/or reduce the points on that question so that it is fair. To be totally honest, I want to see how everyone handles the problem before I decide. For example, if everyone does really well on it, I don't want it to be worth less. Once again, I am going to play it by ear and let you know!
And now, on to Histograms...
A Histogram is a graphical display of data using bars of different heights.
And you decide what ranges to use!
Example: Dress Shop Survey
You asked customers who bought one of the "Aurora" range of skirts how old they were.
The ages were from 5 to 25 years old.
You decide to put the results into groups of 5:
- The 1 to 5 years old range,
- The 6 to 10 years old range,
So when someone says "I am 17"
you add 1 to the "16-20" range.
And here is the result:
You can see (for example) that there were 30 customers between 6 and 10 years old
Histograms are a great way to show results of continuous data, such as:
- how much time
But if your data is in categories (such as Country or Favorite Movie), then you should use a Bar Chart.
How to make a Histogram:
A Histogram Problem:
See you tomorrow! We'll spend some time in class tomorrow going over the Histograms and finishing everything up, but please finish the test tonight so we just need to do a quick review and check over in class tomorrow!
-Miss K :)