Concept explainers
a.
Find the lowest individual score group.
a.
Answer to Problem 20WE
Group
Explanation of Solution
Given information:
The means and standard deviations of an algebra test given to four different groups of
Calculation:
Consider the table
From the data, the smallest value under the column ‘mean’ is
Hence, we may say that Group
b.
Find the smallest range group.
b.
Answer to Problem 20WE
Group
Explanation of Solution
Given information:
The means and standard deviations of an algebra test given to four different groups of
Calculation:
From the data, Range and standard deviation, both are the ,measures of dispersion. Range is the difference between the largest and the smallest numbers in the set. The range and standard deviation both indicate how scattered a distribution is. So the data set which has the smallest standard derivation would probably have smallest range. From the table, group
c.
Find the most closely resembles group.
c.
Answer to Problem 20WE
Group
Explanation of Solution
Given information:
The means and standard deviations of an algebra test given to four different groups of
Calculation:
Mean of four groups are
There are two groups with this score, group
Chapter 15 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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