7.9. Applications of Histograms http://www.ck12.org
7.9 Applications of Histograms
Here you’ll learn how to use the Texas Instruments calculator to construct histograms.
You’re collecting data on the amount of minutes that users stay on your website. You have the results for 1,000 users
and you want to organize these results in intervals of 3 minutes. You’ve noticed that the shortest amount of time a
user stayed on the site was 30 seconds and the longest amount of time was 15.5 minutes. How would you organize
this data?
Watch This
First watch this video to learn about creating histograms with calculators.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter7ApplicationsofHistogramsA
Then watch this video to see some examples.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter7ApplicationsofHistogramsB
Guidance
Technology can also be used to plot a histogram. The TI-83 can be used to create a histogram by using STAT and
STAT PLOT on the calculator. TheTRACE featurecan then be used to find the number of values for each bin,
and then a frequency distribution table can be constructed from these values. When constructing a histogram using
a TI-83 calculator, it’s important that your settings are correct on the WINDOW screen. The setting that determines
the bin size is theXscl setting, so you’ll want to make sure that the number for Xscl is correct before creating your
histogram.
Example A
Scientists have invented a new dietary supplement that is supposed to increase the weight of a piglet within its first 3
months of growth. Farmer John fed this supplement to his stock of piglets, and at the end of 3 months, he recorded
the weights of 50 randomly selected piglets.
The following table is the recorded weights (in pounds) of the 50 selected piglets: