Please answer b) c) d) and e) correctly - for b), need guidance on sample means - for d) goodness of fit and for e) cost

Suppose that a regional express delivery service company wants to estimate the cost of shipping a package (Y) as a function of cargo type, where cargo types includes the following possibilities, fragile, semifragile and durable. Costs for several randomly chose packages of approximately the same weight and same distance shipped, but different cargo types, are provided as shown below Shipment Cargo Type Cost of Shipment 1 Semifragile $7.00 2 Durable $2.00 3 Fragile $13.80 4 Fragile $11.10 5 Semifragile $10.00 6 Fragile $17.20 7 Semifragile $11.50 8 Semifragile $6.50 9 Semifragile $8.50 10 Durable $2.10 11 Fragile $10.90 12 Fragile $12.00 13 Durable $7.50 14 Durable $3.40 15 Durable $1.30

b. Interpret the estimated regression coefficients. You should find that the estimated slope and intercept of the equation are sample means. Which sample means are they?

c. According to the estimated regression equation which type of cargo is the most costly to ship? Which cargo type is the least costly to ship?

d. How does the estimated equation fit the given sample data? How do you think the models goodness of fit could be improved?

e. Given the estimated regression equation, predict the cost of shipping a package with semifragile cargo.

Please answer b) c) d) and e) correctly - for b), need guidance on sample means - for d) goodness of fit and for e) cost