निम्न डेटा 6, 3, 4, 9, 2, 7 और 11 के लिए माध्यिका के ओर माध्य विचलन खोजें।

  1. 1.89
  2. 2.57
  3. 3.14
  4. 6.23

Answer (Detailed Solution Below)

Option 2 : 2.57
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अवधारणा:

माध्यिका के ओर अनियंत्रित डेटा के लिए माध्य विचलन:

''n' अवलोकन x1, x2 ………… .. xके लिए उनके माध्य \(\bar x\) के ओर माध्य विचलन इसके द्वारा दिया गया है: \(M.D = \frac{{\mathop \sum \nolimits_{i = 1}^n \left| {{x_i} - M} \right|}}{N}\) जहां N अवलोकनों की संख्या है और M माध्यिका है।

गणना:

आरोही क्रम में डेटा की व्यवस्था करें -

2, 3, 4, 6, 7, 9, 11

अवलोकनों की संख्या n = 7 (विषम)

माध्यिका \(\left( {\frac{{n + 1}}{2}} \right)th\) पद अर्थात 4था पद = 6 होगा।

उनके माध्यिका M के ओर माध्य विचलन निम्न द्वारा दिया जाता है

यहाँ, M = 6

\(M.D\left( M \right) = \frac{{\left| {2 - 6} \right| + \left| {3 - 6} \right| + \left| {4 - 6} \right| + \left| {6 - 6} \right| + \left| {7 - 6} \right| + \left| {9 - 6} \right| + \left| {11 - 6} \right|}}{7}\)

\(M.D\left( M \right) = \frac{{18}}{7} = 2.57\)

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