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```Chapter 7
Inferences Based on
a Single Sample
Estimation with Confidence
Intervals
7.1
Identifying and Estimating the
Parameter
Target
Definition
7- 3
Procedure
7- 4
Definition
7- 5
Definition
7- 6
7.2
Confidence Interval for a Population Mean:
Normal (z) Statistics
Figure 7.1 Sampling distribution of x
7- 8
Table 7.1
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Figure 7.2 SAS printout with summary
statistics and 95% confidence interval for data
on 100 hospital stays
7 - 10
Definition
7 - 11
Figure 7.3 Confidence intervals for m: 10
samples
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Figure 7.4 Locating za/2 on the standard
normal curve
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Definition
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Figure 7.5 The z value (z.05) corresponding
to an area equal to .05 in the upper tail of the
z-distribution
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Table 7.2
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Procedure
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Definition
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Figure 7.6 MINITAB printout with descriptive
statistics and 90% confidence interval for
Example 7.3
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Procedure
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7.3
Confidence Interval for a
Population Mean: t-Statistic
Figure 7.7 Standard normal (z) distribution
and t-distributions
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Table 7.3
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Figure 7.8 The t.025 value in a t-distribution
with 4 df, and the corresponding z.025 value
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Table 7.4
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Figure 7.9 SPSS confidence interval for
mean blood pressure increase
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Procedure
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Definition
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Table 7.5
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Figure 7.10 MINITAB printout with descriptive
statistics and 99% confidence interval for
Example 7.5
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Figure 7.11 MINITAB stem-and-leaf display of
data in Table 7.5
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Procedure
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Table SIA7.1
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Figure SIA7.1 MINITAB confidence interval for
mean overpayment
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7.4
Large-Sample Confidence Interval for a
Population Proportion
Figure 7.12 Sampling distribution of pˆ
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Procedure
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Procedure
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Definition
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Table 7.6
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Figure 7.13 MINITAB printout with 90%
confidence interval for p
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Procedure
7 - 42
Figure SIA7.2 MINITAB confidence interval for
coding error rate
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7.5
Determining the Sample Size
Figure 7.14 Relationship between sample size
and width of confidence interval: hospital-stay
example
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Figure 7.15 Specifying the sampling error SE
as the half-width of a confidence interval
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Procedure
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Figure 7.16 Specifying the sampling error SE
of a confidence interval for a population
proportion p
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Procedure
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Figure 7.17 Specified reliability for estimate of
fraction defective in Example 7.10
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7.6
Confidence Interval for a Population
Variance (Optional)
Figure 7.18 Several x2 Probability Distributions
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Procedure
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Table 7.7
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Definition
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