Question

(d) mean = 99, median = 98.1, standard deviation = 3
the coefficient of skewness is
this distribution is select

Explanation:

Step1: Apply skewness formula

Use Pearson's coefficient of skewness: $Skewness = \frac{3 \times (Mean - Median)}{Standard\ Deviation}$

Step2: Substitute given values

Substitute Mean=99, Median=98.1, Standard Deviation=3:
$Skewness = \frac{3 \times (99 - 98.1)}{3}$

Step3: Simplify the expression

Cancel 3 in numerator/denominator, compute $99-98.1=0.9$:
$Skewness = 0.9$

Step4: Classify distribution

Positive skewness means right-skewed.

Answer:

The coefficient of skewness is $0.9$.
This distribution is right-skewed (positively skewed).