文档介绍：Chap 3-1
Business Statistics:
A Decision-Making Approach
Chapter 3 Describing Data Using Numerical Measures
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Chap 3-2
Chap 3-3
Nightingale, Florence (1820-1910), British nurse, hospital reformer, and humanitarian.
Chap 3-4
pleting this chapter, you should be able to:
Compute and interpret the mean, median, and mode for a set of pute the range, variance, and standard deviation and know what these values mean
Construct and interpret a box and whiskers plot
Compute and explain the coefficient of variation and
z scores
Use numerical measures along with graphs, charts, and tables to describe data
Chapter Goals
Chap 3-5
Chapter Topics
Measures of Center and Location
Mean, median, mode, geometric mean, midrange
Other measures of Location
Weighted mean, percentiles, quartiles
Measures of Variation
Range, interquartile range, variance and standard deviation, coefficient of variation
Chap 3-6
Summary Measures
Center and Location
Mean
Median
Mode
Other Measures of Location
Weighted Mean
Describing Data Numerically
Variation
Variance
Standard Deviation
Coefficient of Variation
Range
Percentiles
Interquartile Range
Quartiles
Chap 3-7
Summary Measures
中心位置的度量
平均值
中位数
众数
其他位置的度量
加权平均值
Describing Data Numerically
变异程度的度量
方差
标准差
变异系数
全距
百分位数
四分位间距
四分位数
Chap 3-8
Measures of Center and Location
Center and Location
Mean
Median
Mode
Weighted Mean
Overview
Chap 3-9
Mean (Arithmetic Average)
The Mean is the arithmetic average of data values
Sample mean
Population mean
n = Sample Size
N = Population Size
Chap 3-10
Mean (Arithmetic Average)
The mon measure of central tendency
Mean = sum of values divided by the number of values
Affected by extreme values (outliers(离群值))
(continued)
0 1 2 3 4 5 6 7 8 9 10
Mean = 3
0 1 2 3 4 5 6 7 8 9 10
Mean = 4