1. High Temp example 2.2

2. Read the instructions.
Then answer #1 and 2.

3. Class
Limits
Frequency
Bluman, Chapter 3

4. Class Limits Frequency 100-104 2 105-109 8 110-114 18 115-119 13 2 8 18 13 7 1
Bluman, Chapter 3

5. Greetings While you wait make sure to have your homework ready.
There are two columns left on the HIGH TEMP data sheet to fill. Discuss with your group any ideas or guesses how to determine:
CLASS BOUNDARIES
MIDPOINTS

6. Some statistical terms
Class limits
Class upper limit
Class lower limit
How do determine the class limit

7. Class width and class boundaries

8. Class width
The class width is the difference between the lower limits of two consecutive classes.
The class width is the difference between the upper limits of two consecutive classes.
The class width is not the difference between the upper and lower limits of the same class.

9. Class Width
When class widths are used, then there is a gap between each class.
Class width may appear in the raw data.

10. Class Boundaries:
Separate one class in a grouped frequency distribution from another.
Class Boundaries are the midpoints between the upper class limit of a class and the lower class limit of the next class in the sequence. Therefore, each class has an upper and lower class boundary.
The boundaries have one more decimal place than the raw data and therefore do not appear in the data.

11. Class Boundaries
There is no gap between the upper boundary of one class and the lower boundary of the next class. The lower class boundary is found by subtracting 0.5 units from the lower class limit and the upper class boundary is found by adding 0.5 units to the upper class limit.

12. Class
Limits
Frequency
Boundaries
Midpoints 2
102 8
107 18
112 13
117 7
122 1
127
132
Bluman, Chapter 3

13. Pages 39-42 Further reading
All the terms discussed in class so far are from chapter 2 of our text, which will be covered later in the semester.
For now you may review all the terms on :
Pages 39-42