Describe what happens to the measures of central tendency and dispersion when new data points are added to a data set.
This Concept introduces students to the some of the measures of spread commonly used, such as range, standard deviation and variance.
Come up with questions about a topic and learn new vocabulary to determine answers using the table
Connect your daily life experiences with specific points in a reading using a Double Entry Diary.
Learn about the unique dispersion of IQ scores to find out how Einstein ranked.
You can use your knowledge of standard deviation to improve your financial investments.
An experiment and explanation are offered as to why n-1 rather than n is used to calculate standard deviation.
The answers to questions about standard deviation. Answers two questions: why a standard deviation takes the square root of the average of the sum of the squared differences between X and X mean, and why n vs n-1 is used in calculations.
A Q&A website answers the question of why n-1 instead of n is used in calculating standard deviation.