alleryIn the step-deviation method for the mean, $u_i$ is given by:
A$x_i - a$
B$\dfrac{x_i}{h}$
C$\dfrac{a - x_i}{h}$
D$\dfrac{x_i - a}{h}$
Answer & Solution
Correct answer: D. $\dfrac{x_i - a}{h}$
Step deviation: uᵢ = (xᵢ − a)/h, where a is assumed mean and h the class size.
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