The amount of water flowing in a river or stream is typically measured by the discharge rate measured in units of cubic feet per second. Suppose that two possible measuring instruments are being compared by measuring the discharge rate at the same point in a stream when the discharge rate appears to be unchanging. The results of 12 recorded discharge rates for each instrument (A and B) are shown below. Instrument A Measurements (cubic feet per second): 710 740 770 730 770 820 700 680 760 760 740 750 Instrument B Measurements (cubic feet per second): 700 810 720 780 850 830 770 760 720 820 730 740 (a) Calculate the mean and standard deviation of the discharge rates (in cubic feet per second) for Instrument A. (Round your answers to two decimal places.) mean standard deviation cubic feet per second cubic feet per second Calculate the mean and standard deviation of the discharge rates (in cubic feet per second) for Instrument B. (Round your answers to two decimal places.) mean standard deviation cubic feet per second cubic feet per second (b) Compare the mean and standard deviations for the two instruments. What can you determine from this comparison? The mean discharge rate measured by Instrument B is ---Select--- Instrument A. This could mean --Select--- at measured by Instrument A. The standard deviation of the discharge rate measured by Instrument B is --Select-- that measured by the same as higher than Need Help? Read It Submit Answer lower than