years Xi bonus Yi XiYi Xi2 4 5.7 22.8 16 2 3.5 7 4 7.4 10.1 74.74 54.76 5 9 45 25 2 2.7 5.4 4 12 12 144 144   Question 24   Are years of service and annual bonuses related?  The annual bonuses of 6 randomly selected employees (measured in “thousands of dollars”) along their their respective years of service for the company.  Suppose we estimate a linear regression using the Ordinary Least Squares technique of the form: Bonusi = b0 + b1(yearsi) where the subscript i indicates the ith employee The data is reproduced above for this experiment.  Please calculate the standard error of the estimate, or s, for the regression

Simple linear regression model helps to adjust out the effects of confounding factors in a statistical analysis. A. TrueB. FalseC. None of the above choices

Prices and mileage of 48 Dodge 2500 Pickup trucks with Cummins diesel engines.  Prices ranged from $28,925 to $68,650.  Mileage ranged from 315 to 186,466.   While I did not share the trucks were 2013 to 2020 models. Please show all work.  Interpret b0 in the context of this problem.  Interpret b1 in the context of this problem.  What percent of total variation in prices is explained by the regression model?  Provide evidence to support your answer. Price Mileage 52293 34450 50987 23372 62988 21738 37500 81176 66000 23118 47601 71143 47750 18214 42000 32303 50987 23372 28925 143737 42050 58561 51738 9691 51500 23969 44988 48781 29500 114809 46975 16918 63999 15507 46975 16918 43222 50459 38386 87192 42000 68722 62250 14042 62998 21738 32130 103644 52293 34450 52900 68883 53172 3656 53494 315 39594 88441 63246 23631 58250 34974 59391 18383 50650 42737 54976 84200 68650 14401 51114 47433 43900 74106 37450…

What percentage of the variation in infant mortality rate is explained by this model? Based on the results of the ANOVA table, is this a good model and why or why not? Is the relationship between percentage of GDP spent on healthcare and infant mortality rate statistically significant? What is the direction of the relationship? For each one percent increase in percentage of GDP spent on health care, we would expect the infant mortality rate to ________ (increase or decrease) by _____.