1.
The log y transformation linearises the scatter plot by :
Correct Answer(s)
A. Turning the y values into log y values
B. Compressing the y axis values
D. Leaving the x axis values the same
Explanation
The log y transformation linearizes the scatter plot by turning the y values into log y values. This is because taking the logarithm of the y values will spread out the data points that are close together and compress the data points that are far apart, resulting in a more evenly distributed scatter plot. Additionally, the log transformation does not affect the x axis values, so they remain the same.
2.
The log x transformation linearises the scatter plot by :
Correct Answer(s)
A. Changing the x values to log x values
B. Compressing the x axis values
D. Leaving the y values as they are
Explanation
The log x transformation is a mathematical operation that involves taking the logarithm of the x values. This transformation helps to linearize the scatter plot by compressing the x axis values. By taking the logarithm of the x values, the range of the x axis is reduced, making the data points more evenly distributed along the x axis. This compression helps to spread out the data points and make the relationship between the variables more linear. The y values are left unchanged during this transformation.
3.
The scatter plot above will potentially be linearised with :
Correct Answer
A. Log x transformation
Explanation
The scatter plot above will potentially be linearized with a log x transformation because it appears to have an exponential relationship between the x and y variables. By taking the logarithm of the x values, the relationship may become more linear, making it easier to analyze and interpret the data.
4.
The scatter plot above will potentially be linearised with :
Correct Answer(s)
A. Log x transformation
B. Log y transformation
Explanation
The scatter plot above will potentially be linearized with log x transformation and log y transformation. These transformations are commonly used when the relationship between the variables in a scatter plot is exponential or logarithmic. By taking the logarithm of the x and y variables, the data points can be spread out more evenly, making it easier to fit a straight line and analyze the linear relationship between the variables.
5.
The scatter plot above will potentially be linearised with :
Correct Answer
B. Log y transformation
Explanation
The scatter plot will potentially be linearized with a log y transformation. This means that taking the logarithm of the y-values will help to create a linear relationship between the x and y variables. This transformation is useful when the relationship between the variables is exponential, as taking the logarithm can help to make the relationship more linear.
6.
The scatter plot above will potentially be linearised with :
Correct Answer
C. It is is the wrong quadrant for these transformations
Explanation
The scatter plot is in the wrong quadrant for log x or log y transformations. In order for a scatter plot to be linearized using log transformations, the data points should be spread out across all four quadrants. However, in this case, the scatter plot is concentrated in a single quadrant, indicating that log transformations would not be appropriate for linearizing the data.
7.
Which quadrants have potential for a log x transformation
Correct Answer(s)
B. Quadrant 2.
C. Quadrant 3
Explanation
A log x transformation is typically used when the data is positively skewed or has a long tail on the right side. Quadrant 2 and Quadrant 3 in a Cartesian coordinate system represent negative x-values, which means they have potential for a log x transformation.
8.
Which quadrants have potential for a log y transformation
Correct Answer(s)
C. Quadrant 3
D. Quadrant 4
Explanation
A log y transformation is used when the data is skewed or when the range of values is very large. In Quadrant 3 and Quadrant 4, the y-values are negative or close to zero, which can result in a skewed distribution or a wide range of values. Therefore, these quadrants have the potential for a log y transformation to normalize the data and make it more suitable for analysis.
9.
The residual plot above shows the original data is potentially from which quadrants
Correct Answer(s)
A. Quadrant 1
B. Quadrant 2
Explanation
The residual plot above suggests that the original data is potentially from Quadrant 1 and Quadrant 2. This is because the residuals, which are the differences between the observed and predicted values, are positive in Quadrant 1 and negative in Quadrant 2. This indicates that the model tends to overestimate the values in Quadrant 1 and underestimate the values in Quadrant 2. Therefore, the original data is likely to be located in these two quadrants.
10.
The residual plot above shows the original data is potentially from which quadrants
Correct Answer(s)
C. Quadrant 3
D. Quadrant 4
Explanation
The residual plot above shows that the residuals, or the differences between the observed and predicted values, are predominantly negative in Quadrant 3 and positive in Quadrant 4. This indicates that the original data points are potentially located in these quadrants.
11.
The residual plot above shows the original data can potentially be linearised with :
Correct Answer(s)
A. Log x transformation
B. Log y transformation
Explanation
The residual plot above suggests that the original data can potentially be linearized with a log x transformation and a log y transformation. This means that taking the logarithm of the x-values and the y-values may help to create a linear relationship between the variables.
12.
The residual plot above shows the original data can potentially be linearised with :
Correct Answer
C. It can't be linearised with a log transformation
Explanation
The residual plot above indicates that the original data cannot be linearized with a log transformation. This means that neither a log x transformation nor a log y transformation can be used to make the data fit a linear model. The residuals are not randomly scattered around zero, suggesting that there is some non-linear relationship between the variables. Therefore, a log transformation is not suitable for linearizing the data in this case.
13.