Yes/No Questions

• Can a sample have a variance of zero?

• Can a sample have no variance?

• Can a sample have no mean?

• Can a sample have the mean, median and mode all equal each other?

• Can a sample have the mean equal to the standard deviation?

• If a constant amount is added to all elements in a data set, does the mean change?

• If a constant amount is added to all elements in a data set, does the median change?

• If a constant amount is added to all elements in a data set, does the standard deviation change?

• Can the mean of a set of data be negative?

• Can the median of a set of data be negative?

• Can the standard deviation of a set of data be negative?