Mathematics > QUESTIONS & ANSWERS > MATH 225N week 8 stats questions module Correlation,Answered & Corrected. (All)
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 two-week 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 two-week 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 a [Show More]
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