Each year advertisers spend billions of dollars purchasing commercial time on network television.In the first 6 months of one year, advertisers spent $1.1 billion. Who were the largest spenders? In a recent article, the top 10 leading spenders and how much each spent (in million of dollars) were listed: Company A $70.7 Company F $24.8 Company B 63.9 Company G 24 Company C 55.7 Company H 22.7 Company D 54.2 Company I 23.2 Company E 30.3 Company J 20.1 Calculate the sample variance.