Mean
This is the mathematical term most people are actually referring to when they use the word "average."
What is the mean?
Before you can find the median of a dataset, you must first do this to the numbers.
What is put them in order?
The mode is defined as the value in a dataset that appears with this frequency.
What is the most frequent?
To calculate the range of a dataset, you subtract the minimum value from this value.
What is the maximum value?
Unlike a bar graph which shows categories, a histogram shows the frequency of data divided into these continuous intervals.
What are bins? (Accept intervals).
To find the mean of the dataset [5, 10, 15], you add them together and divide by this number.
What is 3?
This is the median of the dataset: [3, 9, 1, 4, 7].
What is 4?
This is the mode of the dataset: [4, 7, 4, 2, 9, 4, 7].
What is 4?
This is the range of the dataset: [12, 5, 18, 2, 14].
What is 16? ($18 - 2$).
True or False: In a standard histogram, there are spaces left between the vertical bars.
What is False? (The bars touch to show continuous data).
Calculate the mean of this dataset: [2, 8, 4, 6].
What is 5?
When a dataset has an even number of values, you find the median by taking the mean of these.
What are the two middle numbers?
If a dataset has two different numbers that both tie for the highest frequency, the dataset is described by this term
What is bimodal?
While the mean and median measure the "center" of a dataset, the range measures this aspect of the data.
What is spread? (Accept variability or dispersion).
If a histogram has a long "tail" stretching out to the right side, the data is said to have this type of skew.
What is positively skewed? (Accept right-skewed).
If a dataset of 5 numbers has a mean of 10, this is the total sum of those 5 numbers.
What is 50?
Find the median of this dataset: [10, 20, 30, 40].
What is 25?
True or False: A dataset of numerical values must always have at least one mode.
What is False? (If all numbers appear an equal number of times, there is no mode).
If a dataset has a range of 0, it means this is true about all the numbers in the dataset.
What is they are all the same?
This axis of a histogram always represents the frequency, or count, of the data points within each interval.
What is the Y-axis?
Because the mean uses every value in a dataset, it is highly sensitive to these extreme, unrepresentative values.
What are outliers?
Unlike the mean, the median is described by this term because it is not heavily distorted by extreme outliers.
What is resistant
The mode is uniquely useful because it is the only measure of central tendency that can be used for this type of non-numerical data.
What is categorical (or qualitative) data?
In a box plot, instead of the full range, statisticians often look at the IQR, which stands for this measure.
What is the Interquartile Range?
If a histogram is perfectly symmetrical and bell-shaped, the mean, median, and mode will all share this trait.
What is they are all equal? (Or they are all in the center).