I already got the answer of a) : Mean=58.2 millions Median= 44.8 Variance= 953.6
ID: 3058294 • Letter: I
Question
I already got the answer of a) :
Mean=58.2 millions
Median= 44.8
Variance= 953.6
Std Dev= 30.9
CV= 53.1%
But I don't know how to describe the usefulness of the Variance, Std Dev, and CV (question b).
The table below reports the number of visitors, X,, to the seven most-visited shopping web sites (with the number of visitors in millions) in January 2013 Most-visited Shopping Web Sites in January 2013 Firm 1. eBay 2. Amazon 3. Wal-Mart 4. Shopping.com 5. Target 6. Apple Computer 7. Overstocked.com Sum 123.4 84.0 45.2 44.8 41.0 34.8 34.4 407.6 15227.56 7056 2043.04 2007.04 1681 1211.04 1183.36 0409.04 (a) Assuming these 7 shopping sites are a population; calculate the mean, median, variance, standard deviation and coefficient of variation for the visitors to the severn popular web sites above in January 2013 making sure to provide the unit of measurement in each case (b) Given your answers to part (a) of this question comment on the usefulness of the variance, standard deviation and coefficient of variation when describing the variation in the number of visits to the shopping sites.Explanation / Answer
I already got the answer of a) :
Mean=58.2 millions
Median= 44.8
Variance= 953.6
Std Dev= 30.9
CV= 53.1%
But I don't know how to describe the usefulness of the Variance, Std Dev, and CV (question b).
The table below reports the number of visitors, X,, to the seven most-visited shopping web sites (with the number of visitors in millions) in January 2013 Most-visited Shopping Web Sites in January 2013 Firm 1. eBay 2. Amazon 3. Wal-Mart 4. Shopping.com 5. Target 6. Apple Computer 7. Overstocked.com Sum 123.4 84.0 45.2 44.8 41.0 34.8 34.4 407.6 15227.56 7056 2043.04 2007.04 1681 1211.04 1183.36 0409.04 (a) Assuming these 7 shopping sites are a population; calculate the mean, median, variance, standard deviation and coefficient of variation for the visitors to the severn popular web sites above in January 2013 making sure to provide the unit of measurement in each case (b) Given your answers to part (a) of this question comment on the usefulness of the variance, standard deviation and coefficient of variation when describing the variation in the number of visits to the shopping sites.Related Questions
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