For the data set {2, 4, 6, 8, 10}, what is the mean deviation?

Practice Questions

Q1
For the data set {2, 4, 6, 8, 10}, what is the mean deviation?
  1. 2
  2. 1.6
  3. 3
  4. 2.5

Questions & Step-by-Step Solutions

For the data set {2, 4, 6, 8, 10}, what is the mean deviation?
  • Step 1: Find the mean of the data set {2, 4, 6, 8, 10}.
  • Step 2: Add all the numbers together: 2 + 4 + 6 + 8 + 10 = 30.
  • Step 3: Count how many numbers are in the data set. There are 5 numbers.
  • Step 4: Divide the total sum by the count of numbers to find the mean: 30 / 5 = 6.
  • Step 5: Calculate the absolute deviations from the mean for each number: |2-6|, |4-6|, |6-6|, |8-6|, |10-6|.
  • Step 6: Calculate each absolute deviation: |2-6| = 4, |4-6| = 2, |6-6| = 0, |8-6| = 2, |10-6| = 4.
  • Step 7: Add all the absolute deviations together: 4 + 2 + 0 + 2 + 4 = 12.
  • Step 8: Divide the total absolute deviation by the number of data points to find the mean deviation: 12 / 5 = 2.4.
  • Mean – The average of a set of numbers, calculated by summing the values and dividing by the count.
  • Mean Deviation – A measure of dispersion that calculates the average of the absolute differences between each data point and the mean.
  • Absolute Value – The non-negative value of a number without regard to its sign, used in calculating mean deviation.
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