Question

A researchor studies water dlarity at the same location in a lake on the same daies during the course of a year and epeats the measurements on the same date 5 years later The resarchr immerses a weighted disk painted black and white and meassures the depth (in inches) at which it is no longer visible. The collected data is given in the table below Complete parts (a) through (l bo 1/25 3/19 5/30 713 9/13 11 43.9 72.4 54.1 707 64.1 52.3 Initial Depth,X Depth Five YearsLaoCV· 50A 71.8 60.0 74.1 69.7 54.8 a) Why is t important to take the measurements on the same dane? O A Using the same dates makos the second sample dependent on the first and reduoes variability in water clarty athrbutable to ate O B. Those are the same dates that al biologjsts une to lake water clarity samples O C. Using the same dates makes iteaser to remember to take samples O D. Using the same dates maximizes the dflerence in water clarity 0.05 level of signticance? Note that the nomal probablity let and bpiat of the de aroxia b Does the evidence suggest that the clanity of the lake is improving at the normally distributed with no outiens Click to select your ansewers) 3 caps lock

Answer 1