Math14

A researcher studies water clarity at the same location in a lake on the same dates during the course of a year and repeats the measurements on the same dates 5 years later. The researcher immerses a weighted disk painted black and white and measures the depth (in inches) at which it is no longer visible. The collected data is given in the table below. Complete parts (a) through (c) below. Observation LO + Date 1/25 3/19 5/30 7/3 9/13 11/7 Initial Depth, X 39.6 52.4 54.3 64.9 38.1 37.1 Depth Five Years Later, Y 38.1 51.6 51.9 65.6 33.5 39.2 ..... c) Draw a boxplot of the differenced data. Does this visual evidence support the results obtained in part b)? Choose the correct graph below. O A. O B. O c. OD. 5 0 3 0 3 6 3 0 Difference Difference Difference Difference Does this visual evidence support the results obtained in part b)? O A. No because the boxplot supports that the lake is becoming more clear, since most differences are positive or near 0. O B. No because the boxplot supports that the lake is becoming more clear, since most differences are negative. O C. Yes because the boxplot supports that the lake is not becoming more clear, since most differences are positive or near 0. O D. Yes because the boxplot supports that the lake is not becoming more clear, since most differences are negative. Next