(a)
To describe: the overall pattern in the
(a)
Answer to Problem 59E
There is a linear association between the two variables.
For small values of laboratory measurement, line fits very well but for higher values of laboratory measurement points deviate much from the line.
Explanation of Solution
Given:
The graph shows a clear direction: the overall pattern moves from lower left to upper right. That is, higher laboratory measurement tends to have higher field measurement. This is a positive linear association between the two variables. For small values of laboratory measurement, line fits very well but for higher values of laboratory measurement points deviate much from the line.
(b)
To explain: whether the points fall on the
(b)
Answer to Problem 59E
No, the points do not fall on the
Explanation of Solution
Let's start with the scatterplot shown here, if field and laboratory measurements all agree then each and every one of the data points were to lie exactly on this line, there would be a perfect
Thus, the points do not fall on the
(c)
To compare: the slope and y intercept of the least-squares line
(c)
Answer to Problem 59E
Slope decreases
y-intercept increases.
Explanation of Solution
If we compare
Chapter 3 Solutions
The Practice of Statistics for AP - 4th Edition
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