Nam Hital Hi Lalat H HNH H v L Mau: 4 - T H B T NH 1) teattle food delib d) Test to your boots Manually of the others will ) Manually contact for the other the li con cartoonides (Write down only the wallet hypotheer. De NOT wall step of the five wep procedure Annotation App.aspx?Annotation AccessArea=1&AnnotationOfUserid=0&IsReadOnly=True&Learning Objectid=217428474&Learning Obje 10096 Question 1 As a researcher you're interested in exploring the relationship between income and food expenditure. The relevant data is collected and saved as "food_income.csv" file. a) Construct a scattar plot of the two variables with income on the vertical axis and years of employment on the horizontal axis. Label x axis as "Income in TL." and y axis is "Food Expenditure in TI." At first glance what is the nature of the relationship between the two variables? b) Compute and interpret the covariance of Food Expenditure" and "Income". Is your result in line with part a Comment on the strength of the relationship. Perform additional computations, if necessary, c) Run a simple regression of yours of employment on income and assign it to an object "incar model" Add graph of your linear regression as a "blue" trendline to the scatter plot you constructed in part d) Test regression assumptions with respect to your regression model. Include plots and R outputs and plots in your report (if necessary) and provide appropriate interpretation the outputs and plots. e) Include regression output generated by R. Write your regression equation. Interpret the slope coefficient Interpret the coefficient of determination. Manually test for the statistical significance of the slope coefficient at 5% significance level using to distribution using critical value approach (Show all steps of the five step procedure) 6) Manually construct a 95% confidence interval for the slope coofficient. Test the statistical significance of the slope coefficient using the constructed confidence interval (Write down only the null and alternative hypotheses. Do NOT show all stops of the five step procedure). Nam Hital Hi Lalat H HNH H v L Mau: 4 - T H B T NH 1) teattle food delib d) Test to your boots Manually of the others will ) Manually contact for the other the li con cartoonides (Write down only the wallet hypotheer. De NOT wall step of the five wep procedure Annotation App.aspx?Annotation AccessArea=1&AnnotationOfUserid=0&IsReadOnly=True&Learning Objectid=217428474&Learning Obje 10096 Question 1 As a researcher you're interested in exploring the relationship between income and food expenditure. The relevant data is collected and saved as "food_income.csv" file. a) Construct a scattar plot of the two variables with income on the vertical axis and years of employment on the horizontal axis. Label x axis as "Income in TL." and y axis is "Food Expenditure in TI." At first glance what is the nature of the relationship between the two variables? b) Compute and interpret the covariance of Food Expenditure" and "Income". Is your result in line with part a Comment on the strength of the relationship. Perform additional computations, if necessary, c) Run a simple regression of yours of employment on income and assign it to an object "incar model" Add graph of your linear regression as a "blue" trendline to the scatter plot you constructed in part d) Test regression assumptions with respect to your regression model. Include plots and R outputs and plots in your report (if necessary) and provide appropriate interpretation the outputs and plots. e) Include regression output generated by R. Write your regression equation. Interpret the slope coefficient Interpret the coefficient of determination. Manually test for the statistical significance of the slope coefficient at 5% significance level using to distribution using critical value approach (Show all steps of the five step procedure) 6) Manually construct a 95% confidence interval for the slope coofficient. Test the statistical significance of the slope coefficient using the constructed confidence interval (Write down only the null and alternative hypotheses. Do NOT show all stops of the five step procedure)
