Question

• Calculate standard deviation from the following data - J = -0.8, Median = 70, Average = 63 Answer A.0 26.25 B.O 28.25 C. 0 24.25 DO 22.25​

Answer 1

Answer:

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Step-by-step explanation:

$to \: find : \\ standard \: deviation \: (σ) \\ \\ given : \\ Skp = - 0.8 \\ \: \\ median = 70 \\ \\ mean \: = 63$

$so \: we \: know \: that \\ whenever \: mode \: is \: indeterminate \\ \\ Skp = \frac{3(mean - median)}{S.D} \\ \\ \\ - 0.8 = \frac{3(63 - 70)}{σ} \\ \\ \\ - 0.8 = \frac{3 \times ( - 7)}{ σ} \\ \\ \\ σ = \frac{ - 21}{ - 0.8} \\ \\ \\ = \frac{21}{0.8} \\ \\ \\ S.D \: (σ )= 26.25$