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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View Full Documenta. 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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 Spring '08
 Bekker
 Normal Distribution, Statistical hypothesis testing

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