The best method to show the association between height and weight of children in a class is by
**Core Concept**
Scatter plots are a graphical representation used to display the relationship between two continuous variables, such as height and weight. This statistical tool helps in visualizing the correlation and pattern between variables.
**Why the Correct Answer is Right**
A scatter plot is the best method to show the association between height and weight of children in a class because it allows for the visualization of the relationship between the two variables. By plotting each child's height against their weight, a scatter plot can reveal patterns such as a positive correlation (taller children tend to weigh more), a negative correlation (taller children tend to weigh less), or no correlation (height and weight are unrelated). This graphical representation enables easy identification of outliers and trends, making it an ideal choice for illustrating the relationship between height and weight.
**Why Each Wrong Option is Incorrect**
**Option A:** Histograms are used to display the distribution of a single variable, not to show the relationship between two variables.
**Option B:** Bar charts are typically used to compare categorical data, not to illustrate the relationship between continuous variables like height and weight.
**Option C:** Pie charts are used to show how different categories contribute to a whole, not to display the relationship between two variables.
**Clinical Pearl / High-Yield Fact**
When analyzing the relationship between two variables, consider using a scatter plot to visualize the data and identify patterns or correlations.
**Correct Answer: C. Scatter plot**