Concept explainers
(a)
To construct a scatterplot of the data given in the question.
(a)
Explanation of Solution
The scatterplot of the data is as follows:
(b)
To show that the
(b)
Explanation of Solution
The mean of
Now to calculate standard deviation of
Consider the following table-
Then the sum of the numbers in the last column to get;
Calculate
The mean of
The standard deviation of
Consider the table-
Now we calculate the sum of numbers in the last column to get;
Calculate
The correlation is determined with the formula:-
Now, we will find the value of
Now computing in the correlation formula we get,
Thus, the correlation is zero.
(c)
To explain that how correlation is zero as the scatterplot shows strong association between
(c)
Explanation of Solution
As the scatterplot shows strong association between
Chapter 4 Solutions
Statistics Through Applications
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