Select the correct choices that complete the sentence below. The ______ class limit is the smallest value within the class and the ______ class limit is the largest value within the class.
Answers
Answer:
Classes
are the categories by which data are grouped.
The ______ class limit is the smallest value within the class and the ______ class limit is the largest value within the class.
lower - upper
The _________________ is the difference between consecutive lower class limits.
class width
There is not one particular frequency distribution that is correct, but there are frequency distributions that are less desirable than others.
The statement is true. Any correctly constructed frequency distribution is valid. However, some choices for the categories or classes give more information about the shape of the distribution.
A researcher wanted to determine the number of televisions in households. He conducts a survey of 40 randomly selected households and obtains the data in the accompanying table. Complete parts (a) through (h) below.
(a) Are these data discrete or continuous? Explain.
The given data are discrete because they can only have whole number values.
Discrete Variable
A discrete variable is a quantitative variable that has either a finite number of possible values or a countable number of possible values
Continuous Variable
A continuous variable may take on every possible value between any two values.
The least-squares regression line always travels through the point (x, y).
True
Open Ended
A table is open ended if the first class has no lower class limit or the last class has no uppper class limit.
Why shouldn't classes overlap when summarizing continuous data in a frequency or relative frequency distribution?
Classes shouldn't overlap so there is no confusion as to which class an observation belongs.