MATH 2283 Lecture 2: Chapter 2 Notes

23 views3 pages
11 May 2017
Creating a Freq. Dist. Using Grouped Quantitative
Data (Histogram)
o Number of classes should ideally be between 4 and 20
One method to determine the number of classes is
2k n, where k = number of classes, n = number
of data points
once k is known, the width is found by:
Estimated class width = (Max data value
minimum data value)/k
o Round to whole number
Class boundaries the minimum and maximum values for each
o choose class boundaries that are easy to read
*Rules for Classes for Grouped Data*
1. Equal-size classes.
2. Mutually exclusive classes: class boundaries cannot
3. Include all data values.
4. Avoid empty classes.
5. Avoid open-ended classes: infinite.
Some data are technically discrete but displayed in a
continuous format
find more resources at
find more resources at
Unlock document

This preview shows page 1 of the document.
Unlock all 3 pages and 3 million more documents.

Already have an account? Log in

Get OneClass Notes+

Unlimited access to class notes and textbook notes.

YearlyBest Value
75% OFF
$8 USD/m
$30 USD/m
You will be charged $96 USD upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.