Elementary Statistics
Chapter 2 – Study Guide,
Practice Questions &
Answers
Updated Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, Frequency Distribution Table that shows classes or intervals of data entries with a count of the number of
entries in each class
Lower Class Limit Least number that can belong to a class
Upper Class Limit Greatest number that can belong to a class
Class Width Distance between lower and upper limits of a consecutive class
Ex: Lower limit 2 - lower limit 1 = class width
Upper limit 2- upper limit 1 = class width
Range Difference between the maximum and minimum data entries
Midpoint Sum of the lower and upper limits of the class divided by 2
Relative Frequency The portion or percentage of the data that falls in that class
Relative Frequency = class frequency/sample size = f/n
Cumulative Frequency Sum of the frequencies of that class and all previous classes
Cumulative frequency of the last class should equal the sample size
Frequency Histogram A bar graph that represents the frequency distribution of a data set
1. The horizontal scale is quantitative and measure the data entries.
2. Vertical scale measures the frequencies of the classes
3. Consecutive bars much touch
Class boundaries Numbers that separate classes without forming gaps between them
Frequency Polygon A line graph that emphasizes the continuous change in frequencies
Relative Frequency Histogram A bar graph that represents the relative frequency distribution of a data set
Chapter 2 – Study Guide,
Practice Questions &
Answers
Updated Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, Frequency Distribution Table that shows classes or intervals of data entries with a count of the number of
entries in each class
Lower Class Limit Least number that can belong to a class
Upper Class Limit Greatest number that can belong to a class
Class Width Distance between lower and upper limits of a consecutive class
Ex: Lower limit 2 - lower limit 1 = class width
Upper limit 2- upper limit 1 = class width
Range Difference between the maximum and minimum data entries
Midpoint Sum of the lower and upper limits of the class divided by 2
Relative Frequency The portion or percentage of the data that falls in that class
Relative Frequency = class frequency/sample size = f/n
Cumulative Frequency Sum of the frequencies of that class and all previous classes
Cumulative frequency of the last class should equal the sample size
Frequency Histogram A bar graph that represents the frequency distribution of a data set
1. The horizontal scale is quantitative and measure the data entries.
2. Vertical scale measures the frequencies of the classes
3. Consecutive bars much touch
Class boundaries Numbers that separate classes without forming gaps between them
Frequency Polygon A line graph that emphasizes the continuous change in frequencies
Relative Frequency Histogram A bar graph that represents the relative frequency distribution of a data set
