1. In order to set rates, an insurance company is trying to estimate the number of sick days that full time workers at a local bank take per year. Based on earlier studies it is known that the...

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Extracted text: 1. In order to set rates, an insurance company is trying to estimate the number of sick days that full time workers at a local bank take per year. Based on earlier studies it is known that the standard deviation is 13.2 days per year. a) How large a sample must be selected if the company wants to be 95% confident that their estimate is within 2 days of the true mean? (Round Z-value to 2 decimals) (b) How large a sample must be selected if the company wants to be 97% confident that their estimate is within 24 hours of the true mean? (Round Z-value to 2 decimals) C) Many people think that a national lobby's successful fight against gun control legislation is reflecting the will of a minority of Americans. In a sample of 3,200 people, 2,250 were in favor of gun control legislation. Estimate the true mean of all Americans who are in favor of gun control legislation using a 94% confidence interval. Assume the population standard deviation is 490. (Round answer to 1 decimal) ctions: On