Assignment3

Assignment3 - Patricia Ade Assignment 3 Chapter 5 Sect 5.2...

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Patricia Ade 04/15/08 Assignment 3 Chapter 5: Sect. 5.2 – 5.10, 5.13 Sect. 5.3 – 5.24, 5.28, 5.30 Sect. 5.4 – 5.38, 5.41, 5.43 Review - 5.97 Chapter 6: Sect. 6.1 – 6.9 Sect. 6.2 – 6.21,6.22, 6.29 Sect. 6.3 – 6.34, 6.36, 6.44 Sect. 6.4 – 6.53, 6.56 Sect. 6.5 – 6.62, 6.66 Chapter 5 Section 5.2 5.10 a) A point estimate for the average number of latex gloves used per week by all healthcare workers with latex allergy is 3. 19 = x . b) For confidence coefficient .95, α = .05 and α/2 = .05/2 = .025. From Table IV, Appendix B, z. 025 = 1.96. The confidence interval is: x ± z a/2 S/ n=19.3 ± 1.9611.9/ 46=19.3 ± 3.44=(15.86,22.74) c) We are 95% confident that the true average number of latex gloves used per week by all healthcare workers with a latex allergy is between 15.86 and 22.74. d) The conditions required for the interval to be valid are:
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a. The sample selected was randomly selected from the target population. b. The sample size is sufficiently large, i.e. n > 30. 5.13 a) For confidence coefficient .99 a=.01 and a/2=.005. From Table, IV, Appendix B z a/2=2.575 x ± z a/2 S/ n= 141.31 ± 2.57517.77/ 100000=141.31 ± .145=(141.2, 141.5) b) We are 99% confident that the true average number of first time candidates for the CPA exam is between 141.2 and 141.5 c) For the interception, part b, to be valid , a random sample condition must be held.
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Assignment3 - Patricia Ade Assignment 3 Chapter 5 Sect 5.2...

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