for each project, along with the project's cost, was recorded. The results are shown below: Project Billed Consulting Hours Total Project Cost $4,323,826 $3,750,964 $3,579,570 $5,053,149 $5,528,308 $5,631,967 $5,257,756 $5,681,909 $4,133,012 $4,596,329 10 11 12 14 15 4 5 8 9 13 16 17 18 19 20 21 23 22 23 24 1 2 3 6 7 3932 3097 2972 3994 4906 5147 4003 4279 3158 4123 2566 3253 3888 3177 3938 3135 5142 5091 4301 2914 3890 M 2869 3683 4217 $3,344,851 $3,868,200 $4,865,998 $4,042,509 $5,067,679 $4,111,731 $6,554,583 $6,042,445 $5,192,769 $3,581,835 $4,745,269 $3,353,559 $5,169,469 $5,147,689 a. Develop a scatter plot based on the sample data. What type of relationship, if any, appears to exist between the two variables? b. Calculate the sample correlation coefficient between billed consulting hours and total project costs. c. Conduct a hypothesis test to determine if there is not a significant positive correlation between billed consulting hours and total project costs. Use a level of significance of 0.01.

for each project, along with the project's cost, was a. Develop a scatter plot based on the sample data. What type of relationship, if any, appears to exist between the two variables? b. Calculate the sample correlation coefficient between billed consulting hours and total project costs. c. Conduct a hypothesis test to determine if there is a significant positive correlation between billed consulting hours and total project costs. Use a level of significance of 0.01 . 14-26. An engineering firm is interested in investigating whether the variability in the cost of small projects (defined as projects under $10 million) can be accounted for, in part, by differences in the number of direct engineering consulting hours billed. A random sample of 24 small projects was randomly selected from small projects performed over the past two years. The number of engineering consulting hours billed