Statistics

The mean of the data set \(\{2, 4, 6, 8, 10\}\) is:

If the variance of a data set is 16, what is the standard deviation?

The median of the data set \(\{3, 7, 9, 15, 21\}\) is:

In a frequency distribution, the mode is the value corresponding to:

For the data set \(\{5, 7, 7, 9, 10, 10, 10, 12\}\), the mode is:

Given the data points \(x = \{1, 2, 3, 4, 5\}\) with frequencies \(f = \{2, 3, 5, 4, 1\}\), what is the mean?

If the cumulative frequency just before the median class is 20, the frequency of the median class is 15, class width is 5, and median class lower boundary is 30, the median is:

The coefficient of variation (CV) is defined as:

If the mean of a data set is 50 and the standard deviation is 5, what is the z-score of the value 60?

A data set has the following five-number summary: minimum = 10, Q1 = 20, median = 30, Q3 = 40, maximum = 50. What is the interquartile range (IQR)?