6. Which of the following describes a situation in which it is safe to employ 1-procedures? (a) n;=10, 12 = 40;both samples are moderately skewed.
(b) n;=10. n2 = 8; sample 1 is approximately normal, while ample 2 is skewed right.
(c) n;=6, n2 = 6; both samples are approximately normal.
(d) n;=35, n2 = 40; both samples are approximately normal, sample 2 has two outliers.
(e) It is safe to use 1-procedures in more than one of the situations above.

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)