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11.2.10-T 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 Date Initial Depth, XI Depth Five Years Later, Yl 6 El 1125 3/19 5/30 48.4 51.1 44.5 47.5 56.5 59.2 53.1 56.9 46.9 36.4 0 of1 Point Question Help 7 0 b) Does the evidence suggest that the clarity of the lake is improving at the a = 0.05 level of signicance? Note that the normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers. Let di = X. Y.. Identify the null and alternative hypotheses. He: V V |_ H1: V V |_ (Type integers or decimals. Do not round.) Enter your answer in the edit fields and then click Check