9. [-/0.1 Points] DETAILS MY NOTES ASK YOUR TEACHER Mean and Deviation Problem -- Question 2: A buyer is provided with a sample of eight metal bars with lengths 1.49, 1.50, 1.51, 1.50, 1.50, 1.51, 1.51, 1.51 meters, measured by an instrument which is accurate to millimeters. What is the standard deviation of the lengths of the bars in this sample? 0.0074 meters O 0.007440245 meters O 0.00744 meters O 0.007 meters 10. [-/0.1 Points] DETAILS MY NOTES ASK YOUR TEACHER Mean and Deviation Problem -- Question 5: A buyer looking for metal bars of length 1.50 meters is to decide between the metal bars produced by two factories. The first factory provides the buyer with a sample of eight metal bars with lengths (First Factory: 1.49, 1.50, 1.51, 1.50, 1.50, 1.51, 1.51 and 1.51 meters) and the second factory provides the buyer with a sample of eight bars with lengths (Second Factory: 1.49, 1.51, 1.50, 1.50, 1.50, 1.51, 1.51 and 1.49 meters), measured by an instrument which is accurate to millimeters. If the samples are assumed by the buyer to really represent the factory's quality of work, which one of the two factories is more desirable for the buyer? Second factory, because the mean for the second factory is closer to 1.50 meters First factory, because the means are the same for both factories but the standard deviation is smaller for the first factory Second factory, because the means are the same for both factories but the standard deviation is smaller for the second factory First factory, because the mean for the first factory is closer to 1.50 meters