Math
Storyboard Text
- 13, 18, 13, 14, 13, 16, 14, 21, 13
- I will teach you how to find the mean, median, mode, and range of the following list of values:
- The mean is the usual average, so let's add and then divide
- 13, 18, 13, 14, 13, 16, 14, 21, 13
- The answer would be (13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13) ÷ 9 = 15
- Note that the mean, in this case, isn't a value from the original list. This is a common result. You should not assume that your mean will be one of your original numbers.
- 13, 18, 13, 14, 13, 16, 14, 21, 13
- The answer would be 13, 13, 13, 13, 14, 14, 16, 18, 21
- The median is the middle value, so first we'll have to rewrite the list in numerical order:
- 13, 18, 13, 14, 13, 16, 14, 21, 13
- So the median is 14.13, 13, 13, 13, 14, 14, 16, 18, 21
- There are nine numbers in the list, so the middle one will be the (9 + 1) ÷ 2 = 10 ÷ 2 = 5th number:
- 13, 18, 13, 14, 13, 16, 14, 21, 13
- The answer is:mean: 15median: 14mode: 13range: 8
- The largest value in the list is 21, and the smallest is 13, so the range is 21 − 13 = 8.
- The mode is the number that is repeated more often than any other, so 13 is the mode.
- 13, 18, 13, 14, 13, 16, 14, 21, 13
- The answer would be (13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13) ÷ 9 = 15
- Note that the mean, in this case, isn't a value from the original list. This is a common result. You should not assume that your mean will be one of your original numbers.
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