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5 Cards in this Set
- Front
- Back
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To find the median, first sort the data/arrange in numerical order:
38, 39, 40, 42, 44, 46, Then the average of the middle #s taken- Not good card |
Notice that there are two middle numbers 44 and 46. To find the median we take the average of the two middle #'s.
44 + 46 |
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This is what the variance and standard deviation do
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a measure of how far the data is spread apart.
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The Median
The median of a set of data values is the middle value once the data set has been arranged in order of its values. To find the mean of 2, 9, and 1, first arrange in order: 1, 2, 9. The median is the middle number or 2. If you have an even number of values such as 1, 2, 5, and 8, the median is the average of the two middle numbers. The median for 1, 2, 6, and 8 is the average of 2 and 6 = 4. |
Calculating the Mean, Median, and Mode
The mean, median, and mode are single numbers that help describe how the individual scores in a data set are distributed in value. A data set consists of the observations for some variable is referred to as raw data or ungrouped data. |
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The Mode
The mode of a set of data values is the number in the set that appears most frequently. For example, the number 5 appears three times in 1, 2, 5, 5, 5, 8, 8, 9. Since the number 5 appears the most times, it is the mode. A set of numbers that can have more than one mode, as long as the number appears more than once. In the data set 1, 2, 2, 3, 3, 4, 5. The mode is 2 and 3. We also can say that this data set is bimodal. If no number appears more than once, then the data set has no mode. |
Calculating the Mean, Median, and Mode
The mean, median, and mode are single numbers that help describe how the individual scores in a data set are distributed in value. A data set consists of the observations for some variable is referred to as raw data or ungrouped data. |
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The Mean
The arithmetic mean is another name for the average of a set of scores. The mean can be found by dividing the sum of the scores by the number of scores. For example, the mean of 5, 8, 2, and 1 can be found by first adding up the numbers. 5 + 8 + 2 + 1 = 16. The mean is then found by taking this sum and dividing it by the number of scores. Our data set 5, 8, 2, and 1 has 4 different numbers, hence the mean is 16 ÷ 4 = 4. |
Calculating the Mean, Median, and Mode
The mean, median, and mode are single numbers that help describe how the individual scores in a data set are distributed in value. A data set consists of the observations for some variable is referred to as raw data or ungrouped data. |
