Homework 9 Answers

BSTA 550

Non-textbook problems

• #1:

Textbook problems

There are answers at the back of the book!! Selected answers (or hints) not provided at the end the book:

• Chapter 31

  • # 14: (a) 0.25     (b) 0.02887     (c) 0.063     (d) 0.0145     (e) 0.01625     (f) 0.0055     (f) 6.195    (g) 0.00433     (h) 61.95     (i) 0.0433

  • # 17: 2.25

  • # 18: 7/15

• Chapter 32

  • # 8: 0.2526

  • # 5: 0.8047

  • # 10: 0.4323

• Chapter 33

  • #10: (a) \(f_x(x)=\frac{x}{9}e^{-x/3}\) for \(x> 0\)     (b) 0.4963

• Chapter 35

  • # 6: (a) 0     (b) -1.13     (c) \(\pm 0.32\)

  • # 10: (a) 0.0475     (b) 0.0475     (c) 0.2283     (d) 68.97 to 81.03     (e) 48 to 102     (f) 68.97

  • # 24: (a) 0.2119     (b) 0.0011

  • NTB # 5:   0.002

• Chapter 36

  • # 4: 0.0044

  • # 12: (a) 0.9525     (b) 0.7939     (c) 0.7939

  • # 14: 0.5911

  • # 16: (a) \(R=8.225\sigma+25\mu\)     (b) \(R=16.45\sigma+100\mu\)     (c) \(R=164.5\sigma+10,000\mu\)     (d) \(R=1.645\sqrt{n}\sigma+n\mu\)

• Chapter 37

  • # 2: 0.8869

  • # 4: 0.0023

  • # 20: 0.3936

  • # 24: 0.4562

  • # 30: (b) 0.0022     (c) \(478.696\approx 479\)