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TABLE 11-2
A realtor wants to compare the mean sales-to-appraisal ratios of residential properties sold in four neighborhoods (A, B, C, and D) . Four properties are randomly selected from each neighborhood and the ratios recorded for each, as shown below.
A: 1.2, 1.1, 0.9, 0.4 C: 1.0, 1.5, 1.1, 1.3
B: 2.5, 2.1, 1.9, 1.6 D: 0.8, 1.3, 1.1, 0.7
Interpret the results of the analysis summarized in the following table:
Source df SS MS F PR > F
Neighborhoods 3.1819 1.0606 10.76 0.001
Error 12
Total 4.3644
-Referring to Table 11-2, the among group degrees of freedom is
Logarithm
The power to which a base number must be raised to produce a given number.
Fechner's Law
A principle in psychophysics stating that the perceived intensity of a stimulus changes in proportion to the logarithm of the actual stimulus intensity.
Standard Stimulus
A specific environmental condition or stimuli that is consistently used throughout an experiment as a benchmark against which subjects' reactions or responses are measured.
Jnd
The just noticeable difference, the minimal change in stimulus intensity required to detect a difference between two stimuli.
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