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Question

Given arithmetic mean = 45, mode = 48, then median =

The correct answer is
46

Calculate Median from Mean and Mode

This problem requires finding the median when the arithmetic mean and mode are provided. We can use the empirical relationship between these three measures of central tendency, which holds for moderately skewed distributions.

Empirical Relationship Formula

The formula connecting mean, median, and mode is:

$ \text{Mean} - \text{Mode} = 3 \times (\text{Mean} - \text{Median}) $

Given Values

  • Arithmetic Mean ($\bar{x}$) = 45
  • Mode = 48

Calculation Steps

  1. Substitute the given Mean and Mode values into the formula:

    $ 45 - 48 = 3 \times (45 - \text{Median}) $

  2. Simplify the left side of the equation:

    $ -3 = 3 \times (45 - \text{Median}) $

  3. Divide both sides by 3 to isolate the term containing the Median:

    $ \frac{-3}{3} = 45 - \text{Median} $

    $ -1 = 45 - \text{Median} $

  4. Rearrange the equation to solve for Median:

    $ \text{Median} = 45 - (-1) $

  5. Calculate the final value for the Median:

    $ \text{Median} = 45 + 1 $

    $ \text{Median} = 46 $

Result

The calculated median is 46.

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Important Questions from Measures of Central Tendency

  1. What is the median of the following data?


    24, 30, 40, 80, 15, 57, 78, 82, 39, 97, 82

  2. In order to conduct exploratory data analysis, which of following are used by a researcher in the five number summary?

    A. Median

    B. First quartile

    C. Mean

    D. Third quartile

    E. Smallest and largest values

    Choose the correct answer from the options given below:
  3. The Geometric mean of four numbers 2, X, 16, 32 is 8. What is the value of X ?
  4. If mean = 28 and mode = 25, the value of median will be :
  5. Assertion (A) : Geometric mean is theoretically considered as the best average to construct index numbers.
    Reason (R) : Geometric mean is used if the range of observations is extremely large.
    Codes :
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