Select the statement that accurately describes unimodal distribution.

• A distribution in which numerous values are more frequent than other values.
• A distribution in which the values are distributed uniformly.
• A distribution in which two distinct values are more frequent than the other values.
• A distribution in which one value is more frequent than other values.

Which of the following statements is true?

• If the variance of a data set is 25, the standard deviation is 12.5.
• If the variance of a data set is 25, the standard deviation is 5.
• If the variance of a data set is 25, the standard deviation is 625.
• If the variance of a data set is 25, the standard deviation is 50.

In which of these cases should the median be used?

• When the data has extreme values
• When the data has small variance
• When the data has nominal values
• When data has no outliers