Math 225N Week 8 Statistics _ Module Correlation 2020 | Math225N _ Module Correlation _ 100% CORRECT

Math 225N Week 8 stats questions module Correlation 2020 – Chamberlain College of Nursing Question Which of the following data sets or plots could have a regression line with a negative slope? Select all that apply. Great work! That's correct. • the difference in the number of ships launched by competing ship builders as a function of the number of months since the start of last year • • the number of hawks sighted per day as a function of the number of days since the twoweek study started • • the total number of ships launched by a ship builder as a function of the number of months since the start of last year • • the average number of hawks sighted per day in a series of studies as a function of the number of days since the ten-week study started• Answer Explanation Correct answer: the difference in the number of ships launched by competing ship builders as a function of the number of months since the start of last year the number of hawks sighted per day as a function of the number of days since the twoweek study started the average number of hawks sighted per day in a series of studies as a function of the number of days since the ten-week study started The slope is related to the increase or decrease of the dependent variable as a function of the independent variable. If the dependent variable can decrease, then the slope can be negative, such as with the difference in the number of ships launched. Question The scatter plot below shows the average cost of a designer jacket in a sample of years between 2000 and 2015. The least squares regression line modeling this data is given by yˆ=−4815+3.765x.A scatterplot has a horizontal axis labeled Year from 2005 to 2015 in increments of 5 and a vertical axis labeled Price ($) from 2660 to 2780 in increments of 20. The following points are plotted: (2003, 2736); (2004, 2715); (2007, 2675); (2009, 2719); (2013, 270). All coordinates are approximate. Interpret the slope of the least squares regression line. Yes that's right. Keep it up! The average cost of a designer jacket decreased by $3.765 each year between 2000 and 2015.The average cost of a designer jacket increased by $3.765 each year between 2000 and 2015. The average cost of a designer jacket decreased by $4815 each year between 2000 and 2015. The average cost of a designer jacket increased by $4815 each year between 2000 and 2015. Answer Explanation