Sample and Weighted Mean

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

A bi-modal data set has two values that occur with the highest frequency.

To calculate a weighted mean, multiply each value by its corresponding weight, sum these products, and then divide by the total of the weights.

Mean = (Sum of all values) / (Number of values)

The mean provides a measure of central tendency, helping to summarize a data set with a single value.

To find the mean, multiply the number of cats by the number of owners for each category, sum these products, and divide by the total number of owners.

Mean.

Mean is the average, median is the middle value when data is ordered, and mode is the most frequently occurring value.

A weighted average is an average that takes into account the relative importance of each value, using weights to reflect their significance.

Outliers can skew the mean, making it higher or lower than the central tendency of the majority of the data.