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• ﻿I don't know how to describe a scatterplot using FODS. Do you?﻿
• ﻿﻿Yes, I do. I'll show you!﻿
• ﻿﻿﻿FODS stands for form, outliers, direction and strength
• ﻿﻿Thank you! But now I need to know how to find and interpret the correlation between 2 variables. Do you know how?
• To interpret the value see what variable is r closest to.﻿
• Yes, I do. r is what is used as the correlation coefficient and the value of r is always going to be between +1 and -1. ﻿
• ﻿Thanks! Now what about what are the properties of correlation?﻿
• ﻿You might also want to know how to use the linear model to make a prediction. You do this by using the equation Y=a + bX + e
• ﻿﻿They are between -1 and +1, independent of change of origin and possess the property of symmetry.
• ﻿Thanks! I just have one more question. What is a residual plot and how does it help determine if a linear model is appropriate?
• ﻿﻿﻿This determines if a linear model is appropriate because ﻿if the points on the graph are randomly around the horizontal axis then it is linear.
• A residual plot is a graph that shows the relationship between an independent variable and the response variable.﻿
• ﻿Thank you!﻿
• ﻿You're welcome!﻿
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