Pie Chart

### What does a pie chart represent? - [ ] Quantitative data changes over time. - [x] Proportions of a whole divided into categories. - [ ] Relationships between variables. - [ ] Frequency distribution of data. > **Explanation:** A pie chart represents the proportions of a whole divided into various categories. Each slice of the pie corresponds to a category's share of the total. ### When is it appropriate to use a pie chart? - [x] When you need to show the composition of a data set. - [ ] When displaying time-series data. - [ ] When comparing discrete categories over time. - [ ] When illustrating relationships between variables. > **Explanation:** Pie charts are appropriate when you need to show the composition of a data set, highlighting proportions within a single data set. ### How many categories are ideal for a pie chart for clarity? - [ ] More than 20 categories. - [ ] Between 10 and 15 categories. - [x] Less than 10 categories. - [ ] Any number of categories. > **Explanation:** For clarity and readability, pie charts are most effective with fewer than 10 categories. Too many slices can make the chart cluttered and difficult to interpret. ### What is a major limitation of pie charts? - [ ] They can display only quantitative data. - [ ] They are difficult to create. - [x] They become less effective with too many categories. - [ ] They can track changes over time. > **Explanation:** A major limitation of pie charts is that they become less effective with too many categories, as it becomes hard to differentiate between small slices. ### Which type of data visualization is more suitable for time series data? - [ ] Pie chart. - [ ] Bar chart. - [x] Line graph. - [ ] Scatter plot. > **Explanation:** Line graphs are more suitable for time series data as they are designed to display data points in chronological order, showing trends over time. ### Why are pie charts useful for media publications? - [x] They provide a quick visual comparison of parts to a whole. - [ ] They are complex and detailed. - [ ] They show changes over time. - [ ] They compare multiple variables. > **Explanation:** Pie charts provide a quick visual comparison of parts to a whole, making them useful for easy interpretation in media publications. ### If a pie chart shows 30% for one category, what does this signify? - [ ] The category's numerical value is 30. - [ ] The category has 30 elements in it. - [x] The category represents 30% of the total. - [ ] The category's percentage will vary over time. > **Explanation:** If a pie chart shows 30% for one category, it signifies that the category represents 30% of the entire data set. ### Which of the following data visualization tools can include more than 10 categories without losing readability? - [ ] Pie chart. - [x] Bar chart. - [ ] Line graph. - [ ] Scatter plot. > **Explanation:** Bar charts can include more than 10 categories without losing readability, as each category is represented by a separate bar, making it easier to distinguish between them. ### Which alternative can often be better than a pie chart for showing parts of a whole? - [x] Bar chart. - [ ] Histogram. - [ ] Scatter plot. - [ ] Line graph. > **Explanation:** A bar chart is often a better alternative for showing parts of a whole, especially when dealing with many categories, as it maintains clarity and readability. ### What characteristic should the total of all slices in a pie chart always represent? - [ ] Any arbitrary value. - [ ] The highest individual value. - [x] 100% of the dataset. - [ ] The smallest category value. > **Explanation:** The total of all slices in a pie chart should always represent 100% of the dataset, ensuring the entire circle accounts for the whole data set.