Assignment:
Question 1 Provide a link for a picture of a scatter plot where the r value is not given. Estimate what you think the r value would be and explain why.
Question 2 Read the information of your text on correlation and causation and Example titled "Spurious Correlation by Lurking Variables". This describes an observed correlation that may be caused by the influence of a third variable. Describe and cite a study where the correlation may be spurious. Alternately, you may choose to create and describe your own study where the observed correlation may be influenced by a third variable.
Reference
Johnson, Richard A. &Gouri K. Bhattacharyya. (2014). Statistics: Principles & Methods. (7th Ed.). Hoboken, New Jersey: John Wiley & Sons, Inc. ISBN: 9781119049661. ISBN: 9781118192450 (includes WileyPLUS). ISBN: 9781118190975 (WileyPLUS stand-alone)
https://books.google.com/books?id=-uGYAgAAQBAJ&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false