Unit sales for new product ABC have varied in the first seven months of this year as follows: Month Jan Feb Mar Apr May Jun Jul Unit Sales 314 285 158 482 284 310 281 What is the (population) standard deviation of the data? Please round your answer to the nearest integer. Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.Mean (Population) HI = n Variance (Population) (Ii - HI) 02 = n Standard Deviation (Population) = Mean (Sample) D = n Variance (Sample) ST n - 1 Standard Deviation (Sample) SI Location of Quartile Lq = (n + 1)4 Note: Other quartile location definitions are in common use.Location of Percentile Lp = (n+ 1)-P 100 Note: Other percentile location definitions are in common use. Pearson's Coefficient of Skewness skp = 3 mean-median standard deviation Excel's SKEW Function (Sample) n Ci sk : I'M= (n - 1)(n - 2) SI For more details about formula parameters or derivation, see the other teaching materials or examine the Solution (Manual) and Solution (Excel) sections of the quiz or exercise solutions