8a) A researcher aims to assess the associative impact of coffee consumption on death rates from heart diseases. For this objective the researcher collects data from 10 countries and intends to use methods of regression. The following table shows data on average per capita coffee consumption and heart disease rate in a random sample of 10 countries. a) State which of the given variables is the outcome variable. b) Provide a scatterplot for the objective of interest using R software, and state if a simple quadratic regression model would be suitable for this data. c) Perform the simple quadratic regression modeling using R software. Provide the fitted model equation and interpret the intercept (if any).

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8a)

A researcher aims to assess the associative impact of coffee consumption on death rates from heart diseases. For this objective the researcher collects data from 10 countries and intends to use methods of regression. The following table shows data on average per capita coffee consumption and heart disease rate in a random sample of 10 countries.

a) State which of the given variables is the outcome variable.

b) Provide a scatterplot for the objective of interest using R software, and state if a simple quadratic regression model would be suitable for this data.

c) Perform the simple quadratic regression modeling using R software. Provide the fitted model equation and interpret the intercept (if any).

 

Yearly coffee consumption in litres 2.5 3.9 2.9 2.4 2.9 0.8 9.1 2.7 0.8 0.7
Death from heart diseases
221 167 131 191 220 297 71 172 211 300
Transcribed Image Text:Yearly coffee consumption in litres 2.5 3.9 2.9 2.4 2.9 0.8 9.1 2.7 0.8 0.7 Death from heart diseases 221 167 131 191 220 297 71 172 211 300
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