If the mean of a data set is 20 and the standard deviation is 4, what is the coe

Practice Questions

Q1
If the mean of a data set is 20 and the standard deviation is 4, what is the coefficient of variation?
  1. 20%
  2. 25%
  3. 15%
  4. 10%

Questions & Step-by-Step Solutions

If the mean of a data set is 20 and the standard deviation is 4, what is the coefficient of variation?
  • Step 1: Identify the mean of the data set, which is given as 20.
  • Step 2: Identify the standard deviation of the data set, which is given as 4.
  • Step 3: Use the formula for the coefficient of variation: Coefficient of Variation = (Standard Deviation / Mean) * 100.
  • Step 4: Substitute the values into the formula: Coefficient of Variation = (4 / 20) * 100.
  • Step 5: Calculate the division: 4 divided by 20 equals 0.2.
  • Step 6: Multiply the result by 100: 0.2 times 100 equals 20.
  • Step 7: Conclude that the coefficient of variation is 20%.
  • Mean – The average of a data set, calculated by summing all values and dividing by the number of values.
  • Standard Deviation – A measure of the amount of variation or dispersion in a set of values.
  • Coefficient of Variation – A standardized measure of dispersion of a probability distribution or frequency distribution, calculated as the ratio of the standard deviation to the mean.
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