Question: 2. A random sample was collected from 15 customers which contained information on the time (measured in minutes) each customer took to complete an online

2. A random sample was collected from 15 customers which contained information on the time (measured in minutes) each customer took to complete an online form. 20.71 31.58 9.89 26.22 20.15 14.99 30.54 18.00 15.63 22.63 25.99 16.66 24.26 18.21 10.51

a)Calculate the mean and standard deviation

b)Calculate the inter-quartile range (IQR) and coefficient of variation

cThe skewness value from the data, as produced by EXCEL software, is 0.121758. What does it mean?

d)Using the empirical rule, what interval of the completion times contains approximately 95% of the data?

e)Is it accurate for the firm to use the empirical rule in as a decision-making guide? Explain your answer.

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