What does a bar graph represent?
A bar graph represents data with rectangular bars where the length of the bar is proportional to the value it represents.
What is the median of the following data set: 1, 3, 3, 6, 7, 8, 9?
The median is the middle value of a data set when arranged in ascending order. Here, the middle value is 6.
What is the mode of the following data set: 1, 2, 3, 3, 4, 5, 6?
The mode is the value that appears most frequently in a data set. In this case, the mode is 3.
How is the mean of a data set calculated?
The mean is calculated by adding all the numbers in the data set and dividing by the number of values.
Which of the following graphs is best suited for showing trends over time?
A line graph is the best way to show data trends over time.
What is the range of the following data set: 4, 8, 15, 16, 23, 42?
The range is the difference between the highest and lowest values in a data set. Here, the range is 42 - 4 = 38.
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What does a pie chart represent?
A pie chart is used to represent data as parts of a whole, showing the proportions of different categories.
If a data set has an outlier, what effect does it have on the mean?
An outlier can significantly affect the mean, making it higher or lower than the true central tendency of the data.
What is a histogram used for?
A histogram is used to represent the distribution of numerical data by grouping data into ranges or bins.