Answer Happy

che studie water clarity of the same location in a lake on the same as during the course of a yow and the ments on the same as 5 yearsThe researchers who did back with and meas the depth in Inches) at which is no longer vise The collected data given in the table below. Complete parts how Observation 1 2 3 4 5 de Date 125313730 73 9/13 111 Initial DepthX 447 503 655 603 662672 Depth Five Years Later, Y 46.1 576 707 580 720664 Gick the icon to view the table of critical ay Why is important to take a moments on the same date? O A Those at the same dates that biologiese to take watat carity samples OB. Using the same we makes it easier to remember to take samples Ocing the same dates makes the second sample pent on the first and reduces will in water darty table to date OD. Using the same date is the difference in water clarity

Please complete A & B B) does the evidence suggest that the clarity of the like is improving at the alpha = 0.05 level of significance? Note: A normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers. Calculate the difference di for each observation i. Calculate the standard deviation sd of the difference data Calculate the test statistic Calculate critical t-value Determine whether to reject the null hypothesis

Observation 1 2 3 4 5 6 Date 1/25 3/195/30 7/3 9/13 11/7 Initial Depth, X 72.4 70.8 70.5 44.7 60.5 36.4 Depth Five Years Later, Y 79.9 66.5 77.8 41.3 64.3 37.9 Click the icon to view the table of critical t-values.