Hello,

The following questions seem a little confusing: I am trying to solve them but not getting the correct solution. I have followed the example and exercise that is given in the textbook which I solved. However, the questions that are given for the exam alway seem to be challenging.

Could you please assistance and provide a detail explanation? Your assist would be greatly appreciated.

1)

3. What's the slope of the line that passes through the points {5, B} and {3, 3}? o A.2 (a 3.2 0 [1152 o 0.152 15. An experiment was conducted using a randomized block design. The data trom the experiment is shown in the table It you wanted to find out whether a difference exists among the treatments, what test statistic should you use? 0 A.F:5.54 O B.F:2.96 O C.F:4_09 O D. F: 6.99 18. Civil engineers use regression analysis to estimate repair and replacement costs of different types of piping. The independent variable in their analysis, I, is the diameter of the pipe [in millimeters]. Data for a sample of 13 different pipe sizes is shown in the table: Ratio Diameter 6.58 6.97 7.39 7.61 7.78 7.92 8.20 8.42 8.60 8.97 9.31 9.47 9.72 80 100 125 150 200 250 300 350 400 450 500 600 700 Find the least squares line relating ratio of repair to replacement cost (y) to pipe diameter (x). O A. 9: 6.6? + .0043: O B. y= 5.13+.oo13x O c. y: s.91+.o122: O D. )7: 6.33+.0238x