# ch06 - 6-1 Numerical SummariesDefinition Sample Mean6-1...

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Unformatted text preview: 6-1 Numerical SummariesDefinition: Sample Mean6-1 Numerical Summaries Example 6-16-1 Numerical Summaries Figure 6-1The sample mean as a balance point for a system of weights.6-1 Numerical Summaries Population MeanFor a finite population with Nmeasurements, the mean isThe sample meanis a reasonable estimate of the population mean.6-1 Numerical Summaries Definition: Sample Variance6-1 Numerical Summaries How Does the Sample Variance Measure Variability?Figure 6-2How the sample variance measures variability through the deviations .xxi−6-1 Numerical Summaries Example 6-26-1 Numerical Summaries 6-1 Numerical Summaries Computation of s26-1 Numerical Summaries Population VarianceWhen the population is finite and consists of N values, we may define the population varianceasThe sample varianceis a reasonable estimate of the population variance.6-1 Numerical Summaries Definition6-2 Stem-and-Leaf Diagrams Steps for Constructing a Stem-and-Leaf Diagram6-2 Stem-and-Leaf Diagrams Example 6-46-2 Stem-and-Leaf Diagrams 6-2 Stem-and-Leaf Diagrams Figure 6-4Stem-and-leaf diagram for the compressive strength data in Table 6-2. 6-2 Stem-and-Leaf Diagrams Example 6-56-2 Stem-and-Leaf Diagrams Figure 6-5Stem-and-leaf displays for Example 6-5. Stem: Tens digits. Leaf: Ones digits. 6-2 Stem-and-Leaf Diagrams Figure 6-6Stem-and-leaf diagram from Minitab. Data Features•The medianis a measure of central tendency that divides the data into two equal parts, half below the median and half above. If the number of observations is even, the median is halfwaybetween the two central values....
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ch06 - 6-1 Numerical SummariesDefinition Sample Mean6-1...

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