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Section 1.1
Statistics and
Data
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Section 1.3
Describing
Qualitative
Data
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Figure 1.1 SAS bar graph for data on
22 aphasiacs
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Figure 1.2 SPSS pie chart for data
on 22 aphasiacs
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Figure 1.3 Relative frequency
distribution: IQs of identical twins
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Figure 1.4 Probability distribution
for a quantitative variable
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Figure 1.5 MINITAB stem-and-leaf
plot for EPA gas mileage
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Figure 1.6 SPSS histogram for 100
EPA gas mileage
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Figure 1.7 MINITAB printout:
Describing the no-show data, Example
1.6
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Section 1.6
Normal
Probability
Distribution
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Figure 1.8 A normal probability
distribution
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Figure 1.9 Several normal distributions
with different means and standard
deviations
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Figure 1.10 Normal probability
distribution µ = 50, σ = 15
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Figure 1.11 A distribution of z scores
(a standard normal distribution)
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Figure 1.12 Standard normal
distribution: µ = 0, σ = 1
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Figure 1.14 Sampling distributions of
x for different populations and different
sample sizes
_
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Figure 1.15 A population relative
frequency distribution and the sampling
distribution for y
_
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Figure 1.16 The sampling
distribution of y_
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Section 1.8
Estimating a
Population
Mean
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Figure 1.17 Sampling distribution
of y_
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Figure 1.18 Locating zα/2 on the
standard normal curve
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Figure 1.19 SAS descriptive statistics
for n = 50 sample attention times
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Figure 1.20 The t.025 value in a t
distribution with 4 df and the corresponding
z.025 value
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Figure 1.21 MINITAB descriptive statistics
and confidence interval for Example 1.12
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Figure 1.22 The sampling
distribution of y for µ = µ 0
_
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Figure 1.23 Location of the rejection
region for various alternative hypotheses
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Figure 1.24 Testing Ha: µ
> µ 0 using a p-value
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Figure 1.25 SPSS printout for
Example 1.14
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Figure 1.26 Rejection region for
Example 1.15
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Figure 1.27 SAS output for
testing benzene mean
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Figure 1.28 SPSS analysis for diet
study, Example 1.16
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Figure 1.29 SAS output for
Example 1.17
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Figure 1.30 Rejection region for
Example 1.17
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Figure 1.31 Rejection region for
analysis of data in Table 1.17
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Figure 1.32 MINITAB paired difference
analysis of data in Table 1.17
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Figure 1.33 An F distribution with 7
and 9 df
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Figure 1.34 An F distribution with 7
and 9 df: α = 05
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Figure 1.35 Rejection region for
production example F distribution
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Figure 1.36 SAS F-test for the data
Table 1.19