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14 Cards in this Set
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 Back
How do you determine the number of classes for a frequency distribution? 
2^k where 2^k >= n 

How do you determine relative frequency? 
# observation / total 

A set of data consists of 38 observations. How many classes would you recommend for the frequency distribution? 
2^k >= 38
k = 6 

How do you determine class intervals? 
i >= (h  l / k)
h = highest observation l = lowest observation k = class 

A grouping of qualitative data into mutually exclusive classes showing the number of observations in each class is known as a ______________. 
frequency table 

A grouping of quantitative data into mutually exclusive classes showing the number of observations in each class is known as ___________. 
frequency distribution 

A graph in which the classes for a qualitative data are reported on the horizontal axis and the class frequencies (proportional to the heights of the bars) on the vertical axis is called ____________. 
bar chart 

A _________ chart shows the proportion or percent that each class represents of the total. 
pie chart 

A graph in which the classes of a quantitative data set are marked on the horizontal axis and the class frequencies on the vertical axis is called a _____________. 
histogram or frequency polygon 

A set of data contained 70 observations. How many classes would you suggest to construct a frequency distribution? 
2^k >= 70
k = 7
7 classes 

The distance between successive lower class limits is called ________. 
class intervals 

The average of the respective class limits of two consecutive classes is the ___________. 
midpoint 

In a relative frequency distribution, the class frequencies are divided by ________. 
the total number of observations 

A cumulative frequency polygon is created by line segments connecting the ____________ and the corresponding cumulative frequencies. 
upper class limits 