Sample and Weighted Mean

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 does bi-modal mean in a data set?

Back

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

Front

How do you calculate a weighted mean?

Back

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

Front

What is the formula for calculating the mean?

Back

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

Front

What is the significance of the mean in data analysis?

Back

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

Front

How do you find the mean number of cats owned in a survey?

Back

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.

Front

What is another term for average in statistics?

Back

Mean.

Front

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

Back

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

Front

What is a weighted average?

Back

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

Front

How does the presence of outliers affect the mean?

Back

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