Microsoft Office

Part V
Analyzing Data with Excel
The output for this test consists of the means and variances for each of the two samples, the value of F, the
critical value of F, and the significance of F.
The Fourier Analysis tool
The Fourier Analysis tool performs a “fast Fourier” transformation of a range of data. Using the Fourier
Analysis tool, you can transform a range limited to the following sizes: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512,
or 1,024 data points. This procedure accepts and generates complex numbers, which are represented as text
string (not numerical values).
The Histogram tool
The Histogram tool is useful for producing data distributions and histogram charts. It accepts an Input
range and a Bin range. A bin range is a range of values that specifies the limits for each column of the histogram.
If you omit the bin range, Excel creates 10 equal-interval bins for you. The size of each bin is determined
by the following formula:
=(MAX(input_range)–MIN(input_range))/10
The Histogram dialog box is shown in Figure 38.6. As an option, you can specify that the resulting histogram
be sorted by frequency of occurrence in each bin.
FIGURE 38.6
The Histogram tool enables you to generate distributions and graphical output.
If you specify the Pareto (Sorted Histogram) option, the bin range must contain values and can’t contain
formulas. If formulas appear in the bin range, Excel doesn’t sort properly, and your worksheet displays error
values. The Histogram tool doesn’t use formulas, so if you change any of the input data, you need to repeat
the histogram procedure to update the results.
CROSS-REF
For other ways of generating frequency distributions, refer to Chapter 14 and Chapter 35.
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