Virginia Communication and Literacy Assessment (VCLA) Practice Test

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Prepare for the Virginia Communication and Literacy Assessment. Study effectively with flashcards and multiple choice questions, each with hints and explanations. Ace your exam preparation today!

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What type of graph organizes numerical data into intervals and uses bars to represent frequency?

Pictograph
Bar graph
Histogram
Scatter plot

The correct answer is: Histogram

A histogram is a specific type of graph that effectively organizes numerical data into defined intervals, known as bins, and uses bars to visually represent the frequency of data points within those intervals. Each bar’s height correlates to the number of occurrences of data points that fall within a particular range, providing a clear visual depiction of the distribution of the dataset. Histograms are particularly useful for understanding the underlying frequency distribution of continuous numerical data, allowing patterns such as skewness, modality, or graphical representations of normal distributions to be easily identified. In contrast, the other options mentioned serve different purposes. A pictograph uses images or symbols to represent data, which is more qualitative than quantitative. Bar graphs compare categorical data rather than display frequency distributions of numerical variables. Scatter plots depict the relationship between two quantitative variables and do not involve frequency intervals or bars at all.