D9 U5 Study Guide #2

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges (bins).

Front

What does 'unimodal' mean in the context of a histogram?

Back

Unimodal refers to a histogram that has one clear peak or mode, indicating that most data points cluster around a single value.

Front

What does 'skewed right' mean in a histogram?

Back

Skewed right means that the tail on the right side of the histogram is longer or fatter than the left side, indicating that there are a few high values that pull the mean to the right.

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

What is the standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values, indicating how much the values deviate from the mean.

Front

What is the median?

Back

The median is the middle value in a data set when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the range in statistics?

Back

The range is the difference between the highest and lowest values in a data set, providing a measure of how spread out the values are.

Front

What does it mean if the mean is greater than the median?

Back

If the mean is greater than the median, it suggests that the data set is skewed to the right, with higher values pulling the mean up.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the first quartile (Q1) and the third quartile (Q3) in a data set, representing the range of the middle 50% of the data.

Front

How does adding an outlier affect the mean and median?

Back

Adding an outlier can significantly affect the mean, pulling it in the direction of the outlier, while the median remains relatively unaffected.