What is the mean of 5,11,2,12,4,2

The mean is (5 + 11 + 2 + 12 + 4 + 2) / 6 = 36 / 6 = 6.

What is the range of 3,4,5,5,5,6,7

The range is the difference between the highest and lowest values in the set.

The highest value is 7 and the lowest value is 3.

So, the range is 7 - 3 = 4.

Therefore, the range of the set {3,4,5,5,5,6,7} is 4.

In order to find the median, the data must be sorted from least to greatest first. True or False

True.

In order to find the median, the data must be arranged in either ascending or descending order. This is because the median is the middle value in a set of data, and in order to determine the middle value, the data must be sorted accordingly.

You use this type of graph when comparing a change over the course of time

pie or circle graph, line graph or bar graph

You use a line graph when comparing a change over the course of time. A line graph is a type of chart used to display information that changes over time. The independent variable is usually plotted on the x-axis, while the dependent variable is plotted on the y-axis. The line connecting the points shows the trend over time.