solution-4-2010_1

# solution-4-2010_1 - Chap 5 5.7 5.8 5.18 5.45 5.56...

• Notes
• 2

This preview shows pages 1–2. Sign up to view the full content.

Chap. 5: 5.7, 5.8, 5.18, 5.45, 5.56 5.7 (a) (252)(.6 5 )(.4 5 ) = .2007 (b) (210)(.6 6 )(.4 4 ) = .2508 (c) (120)(.6 7 )(.4 3 ) = .2150 (d) .2007 + .2508 + .2150 = .6665 (e) .6665 (from part (d)) 5.8 (a) Probability .0 .7 5 = .1681 .2 (5)(.3)(.7 4 ) = .3602 .4 (10)(.3 2 )(.7 3 ) = .3087 .6 (10)(.3 3 )(.7 2 ) = .1323 .8 (5)(.3 4 )(.7) = .0284 1.0 .3 5 = .0024 (b) .10 .20 .30 .40 Probability 0 .8 .2 .4 .6 1.0 p ^ Compared with Figure 5.4, this distribution is more spread out (more dispersed) and is more skewed. 5.18 μ = 145; σ = 22. (a) z = = .45; Table 3 gives .6736. z = = -.45; Table 3 gives .3264. Thus, .6736 - .3264 = .3472 or 34.72% of the plants. (b) n = 16; σ = 22/= 5.5. z = = 1.82; Table 3 gives .9656. z = = -1.82; Table 3 gives .0344. Thus, .9656 - .0344 = .9312 or 93.12% of the groups.

This preview has intentionally blurred sections. Sign up to view the full version.

(c) Pr{135 155} = .9312 (from part (b)). (d) n = 36; σ = 22/= 3.67. z = = 2.72; Table 3 gives .9967.
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: z = = -2.72; Table 3 gives .0033. Thus, .9967 - .0033 = .9934 or 99.34% of the groups. 5.45 μ = 800; σ = 90. (a) z = = .56; Table 3 gives .7123. z = = -.56; Table 3 gives .2877. .7123 - .2877 = .4246 or 42.46% of the plants. (b) n = 4; σ = σ /= 90/= 45. z = = 1.11; Table 3 gives .8665. z = = -1.11; Table 3 gives .1335. .8665 - .1335 = .7330 or 73.30% of the groups will have means in this range. 5.56 σ = = = 1.25. (a) z = = 1.6; Table 3 gives .9452. z = = -1.6; Table 3 gives .0548. .9452 - .0548 = .8904. (b) z = = 1.6; Table 3 gives .9452. z = = -1.6; Table 3 gives .0548. .9452 - .0548 = .8904. (c) z = = 1.6; Table 3 gives .9452. z = = -1.6; Table 3 gives .0548. .9452 - .0548 = .8904....
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern