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Question

The mean of a data is 47 and its median is 61. The mode (using empirical relation) of the data is:

The correct answer is
89

Calculating Mode Using Empirical Relation

This question requires calculating the mode of a dataset using the empirical relation between mean, median, and mode.

Empirical Relation Formula

The empirical relation connecting the mean, median, and mode for moderately skewed distributions is given by:

$Mode = 3 \times Median - 2 \times Mean$

Given Data

  • Mean = 47
  • Median = 61

Calculation Steps

  1. Substitute values: Plug the given mean and median values into the empirical relation formula.

    $Mode = 3 \times (61) - 2 \times (47)$

  2. Perform Multiplication: Calculate the products separately.

    $3 \times 61 = 183$

    $2 \times 47 = 94$

  3. Perform Subtraction: Subtract the result of the mean term from the result of the median term.

    $Mode = 183 - 94$

    $Mode = 89$

Result

The calculated mode of the data is 89.

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Important Questions from Measures of Central Tendency

  1. The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is

  2. The ‘less than’ ogive curve and the ‘more than’ ogive curve intersect at

  3. The observations 4, 1, 4, 3, 6, 2, 1, 3, 4, 5, 1, 6 are outputs of 12 dices thrown simultaneously. If m and M are means of lowest 8 observations and highest 4 observations respectively, then what is (2m + M) equal to ?  

  4. The mean of the series x 1, x 2… x nis X̅. If x 2­ is replaced by λ, then what is the new mean?

  5. The mean of a group of 100 observations was found to be 20. Later it was found that four observations were incorrect, which were recorded as 21, 21, 18 and 20. What is the mean if the incorrect observations are omitted?

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