Graphical Relationship - Discussion Week 3

Response 1 - Instructions

· State your peers R-squared ( R2) value, as well as the  R2 value you computed between BMI and HDL cholesterol level.

· Explain which of the relationships is stronger, your peers or yours? Use the  R2 value to justify your reasoning.

· Calculate the coefficient of determination ( R2 value) for your peer’s data. Explain what this indicates about the relationship between BMI and HDL cholesterol.

· Explain one reason we cannot assume that changes in HDL cholesterol are caused by changes in BMI.

WEEK 3 – Discussion _ Mariah Vickerman

The linear correlation coefficient between BMI and HDL in my data set was -0.29796. The relationship between BMI and HDL cholesterol is a weak negative correlation. I concluded that it is weak because the correlation coefficient is closer to 0 than 1 or -1. This also means that as BMI Increases, HDL cholesterol would decrease because they have a negative correlation. Lastly, the line of best fit is y= -0.9248x+81.8917.

HDL vs BMI for smokers and non-smokers

BMI

y = -0.096x + 33.871

52 65 63 45 86 49 57 63 65 47 56 46 62 61 68 66 61 40 64 81 53 39 82 62 84 55 138 54 57 41 57 47 47 43 63 97 34 63 58 39 26 62 41 74 65 44 46 47 39 36 60 42 45 49 35 46 31 46 67 49 40 42 54 45 23.9 40.200000000000003 34.700000000000003 23.5 20.7 32.4 30.2 37.200000000000003 29.4 26.5 30.5 20 29.4 31.1 28.9 36.9 29.1 31.6 21.9 34.6 27.5 21.6 25.8 25.7 26.2 21.5 29.4 34.6 24.4 36.5 23.1 20.2 29.6 24.9 19.899999999999999 25.8 26 33.700000000000003 23.4 32.700000000000003 26.8 18.100000000000001 21.3 23.9 25.2 22.8 29.7 31.2 44.2 29.3 31.6 35 27.1 29.6 26.8 29.2 27.6 26.2 30.7 33.9 31.5 26.4

HDL

BMI