A generator company has determined It's custom long-lasting generator will function on average 18 months of straight running time with a standard deviation of 2 months. What is the long-lasting generators range of running time months that will Include 68% around the mean? 16 to 20 14 to 18 17 to 21 18 to 22 Question 21 A generator company has determined it's custom long-lasting generator will function on average 18 months of straight running time with a standard deviation of 2 months. What is the long-lasting generators range of running time months that will include 99.7% around the mean? 12 to 24 12 to 20 16 to 18 10 to 24