MATH 225N - STATISTICAL REASONING CHAPTER 2
QUESTIONS WITH THE CORRECT ANSWERS
Frequency Table - correct answers-A table that shows classes or intervals of data with a count of the
number entries in each class
Frequency of a class - correct answers-The number of data entries in the class.
1-5 - correct answers-(1) Lower class limit
(5) Upper class limit
1 - 5 - correct answers-(1 - 5) Class width is the total number of numbers
Constructing a Frequency Distribution from a Data Set - correct answers-1. Decide on the number of
classes to include in the frequency distribution.
2. Find the class width.
A. Find the range of the data: Highest data value - Lowest data value
B. Divide the range by the number of classes.
C. Round UP to the next whole number.
3. Find the class limits.
A. Use the minimum data entry as the lower limit of the first class.
B. Add the class width to the lower limit to find the lower limit of the next class.
4. Make a tally mark for each data entry in the appropriate class.
5. Count the tally marks to find the total frequency "f" for each class.
Relative Frequency - correct answers-The percentage of data in a class. (Frequency / Total Frequency)
Cumulative Frequency - correct answers-The sum of the frequencies for that class and all previous
classes.
Cumulative Relative Frequency - correct answers-The accumulation of the previous relative frequencies.
Frequency Histogram - correct answers-A bar graph that represents the frequency distribution of a data
set.
QUESTIONS WITH THE CORRECT ANSWERS
Frequency Table - correct answers-A table that shows classes or intervals of data with a count of the
number entries in each class
Frequency of a class - correct answers-The number of data entries in the class.
1-5 - correct answers-(1) Lower class limit
(5) Upper class limit
1 - 5 - correct answers-(1 - 5) Class width is the total number of numbers
Constructing a Frequency Distribution from a Data Set - correct answers-1. Decide on the number of
classes to include in the frequency distribution.
2. Find the class width.
A. Find the range of the data: Highest data value - Lowest data value
B. Divide the range by the number of classes.
C. Round UP to the next whole number.
3. Find the class limits.
A. Use the minimum data entry as the lower limit of the first class.
B. Add the class width to the lower limit to find the lower limit of the next class.
4. Make a tally mark for each data entry in the appropriate class.
5. Count the tally marks to find the total frequency "f" for each class.
Relative Frequency - correct answers-The percentage of data in a class. (Frequency / Total Frequency)
Cumulative Frequency - correct answers-The sum of the frequencies for that class and all previous
classes.
Cumulative Relative Frequency - correct answers-The accumulation of the previous relative frequencies.
Frequency Histogram - correct answers-A bar graph that represents the frequency distribution of a data
set.
