Paint used for marking lanes on highways must be very durable. in one trial paint from different suppliers, labeled GS, FD and L were tested on the five different highway sites donated 1, 2, 3, 4, 5. after a considerable length of time which includes different levels of traffic and weather, the average wear for the sample five sites was as follows.

paint supplier

gs fd l

1 69 59 55

2 83 65 65

3 74 64 59

4 61 52 58

the objective was to compare the wear of the paint from the different suppliers

a) what kind of experimental design is this?

b) analyze the data from the experiment (use = 0.05) and draw conclusion

c) compute a 95 percent confidence interval estimate of the mean wear of paint from suppliers GS.

d) make comparisons among the three paints to determine specifically which paint differ in wear condition

QUESTION 7 Paint used for marking lanes on highways must be very durable. In one trial paint from three different suppliers, labeled GS, FD, and L were tested on five different highway sites, denoted 1, 2, 3, 4, 5. After a considerable length of time, which included different levels of traffic and weather, the average wear for the samples at the five sites was as follows: 1 Sites 2 GS 69 83 74 61 Paint Suppliers FD 59 65 64 32 L 55 65 59 58 3 4 The objective was to compare the wear of the paints from the different suppliers (a) What kind of an experimental design is this? (2 points) (b) Analyze the data from this experiment (use a = 0.05) and draw conclusions (18 points) (c) Compute a 95 percent confidence interval estimate of the mean wear of paint from supplier GS (10 points) (d) Make comparisons among the three paints to determine specifically which paints differ in the wear condition (12 points) (e) Construct a set of orthogonal contrasts assuming that at the outset of the experiment you suspected the wear of paint from GS to be different from the other two What QUESTION 7 Paint used for marking lanes on highways must be very durable. In one trial paint from three different suppliers, labeled GS, FD, and L were tested on five different highway sites, denoted 1, 2, 3, 4, 5. After a considerable length of time, which included different levels of traffic and weather, the average wear for the samples at the five sites was as follows: 1 Sites 2 GS 69 83 74 61 Paint Suppliers FD 59 65 64 32 L 55 65 59 58 3 4 The objective was to compare the wear of the paints from the different suppliers (a) What kind of an experimental design is this? (2 points) (b) Analyze the data from this experiment (use a = 0.05) and draw conclusions (18 points) (c) Compute a 95 percent confidence interval estimate of the mean wear of paint from supplier GS (10 points) (d) Make comparisons among the three paints to determine specifically which paints differ in the wear condition (12 points) (e) Construct a set of orthogonal contrasts assuming that at the outset of the experiment you suspected the wear of paint from GS to be different from the other two What