The following table shows the waiting times (in minutes) of a sample of (10X-1) buses and their frequencies at Mohakhali

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The following table shows the waiting times (in minutes) of a
sample of (10X-1) buses and their frequencies at Mohakhali bus
terminal which was used in a study.
a. Compute the average waiting time of the buses.
Answer in exact fraction, or rounded to at least 4 decimal
places
minutes unanswered
b. Compute the median waiting time of the buses.
Answer in exact fraction, or rounded to at least 4 decimal
places.
minutes unanswered
c. Determine the variance of the waiting time.
Answer in exact fraction, or rounded to at least 4 decimal
places.
unanswered
d. Find the Pearson's Coefficient of Skewness using the relation
between Mean, Median and Standard Deviation.
Answer in exact fraction, or rounded to at least 4 decimal
places.
unanswered
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