HW2A: Name ______________________________ Class Number _________________ 1. Determine the mean, standard deviation, and CV (coefficient of variation) for each of the following 4 data sets:A) mean 22.088 std. dev. 2.619 CV 11.86%B) mean 5.891 std. dev. 1.510 CV 25.63%C) mean 1703 std. dev. 339 CVD) mean 5.05 std. dev. 3.91 CV2. Given a data set with a mean of x= 120 and a standard deviation of s = 1.8, determine the z-score for each of the following data values: 117.6 120117.6 1201.331.8z-= =-120 12001.8z-= =125.4 132.5125.4 12031.8z-= =132.5 1206.941.8z-= =3. How many standard deviations is the data value 240 from the mean if x= 200 and s = 30?240 2001.3330z-= =4. Suppose that two companies are available to sell you parts for your manufacturing plant. Parts from Company A have a standard deviation of 1.6 and parts from Company B have a standard deviation of .54. Which company would you choose to supply you with parts?We would want the one with the lowest standard deviation. We would want Company B.5. Given a data set A with a mean of 120x = and a standard deviation of 2.4s =and data set B with a mean of112x = and a standard deviation of 1.5s =, which data set is more consistent?More consistent would mean less variation. Data set B has the least variation (smaller s) so it is more consistent.A B C D22.73 5.139 2195 12.03525.65 4.919 1615 8.00619.47 6.140 1242 1.63220.39 8.350 1825 0.86926.32 3.767 1349 8.85824.40 4.760 1697 5.79021.59 4.941 2001 3.37921.60 8.863 1.29018.96 4.952 2.97819.77 6.829 9.1635.748