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Can there be 2 modes in a data set?
There can be two modes in a data set. For example, in the data set {0,1,2,3,3,4,5,5,9}, there are two modes: 3 and 5.
Will a set of data always have a mode?
No, because sometimes sets of data can have different numbers and other sets of data can have modes in them.
What is the middle value or average of the two middle values in a data set?
The middle value in a data set is the median. If there are an even number of values in the set, you average the middle two values to get the median.
What if the data set has a even amount of numbers and the median was between the same numbers?
The median of a set of data is the "middle" value. Whenever there is an even number of values in a data set, you take the middle two numbers, add them together, and divide by two. For cases when the two middle numbers happen to be the same, you still add them up and divide by two. The key point is just that the answer will be the same as both the numbers.
What is relationship between two sets of data as one set of values decreases as the other set increases?
Inverse proportion
