Statistics

Front

What is the MEDIAN of a data set?

Back

The median is the middle value of a data set when it is ordered from least to greatest. If there are two middle numbers, add them together and divide by 2.

Front

How do you calculate the RANGE of a data set?

Back

The range is calculated by subtracting the smallest value in the data set from the largest value.

Front

What is the formula to find the average (mean) of a data set?

Back

The average (mean) is calculated by adding all the values in the data set and dividing by the number of values.

Front

What is normal distribution?

Back

Normal distribution is a probability distribution that is symmetrical and bell-shaped, where most of the observations cluster around the central peak and probabilities for values further away from the mean taper off equally in both directions.

Front

What is the difference between mean, median, and mode?

Back

Mean is the average of a data set, median is the middle value, and mode is the most frequently occurring value in the data set.

Front

What does it mean if a data set is skewed?

Back

A skewed data set is one that is not symmetrical and has a tail on one side. If the tail is on the right, it is positively skewed; if on the left, it is negatively skewed.

Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group in statistical analysis.

Front

What is the purpose of 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 is the significance of the standard deviation?

Back

Standard deviation measures the amount of variation or dispersion in a set of values. A low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.

Front

What is a box plot?

Back

A box plot is a standardized way of displaying the distribution of data based on a five-number summary: minimum, first quartile, median, third quartile, and maximum.