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Figure 8.3 - Normal distribution curves
for different 

Finding the size of the parts of one lot after processing on
the machine allows you to divide them into several groups with
sizes within a certain interval. If you set the abscissa to the
value of A, and the ordinate is m, then the resulting curve is a
size distribution polygon in a given batch of parts, which
consists of N parts.
8.4 Individual task. Perform mathematical processing of
the results of measuring the batch of 50 parts to determine the
average arithmetic size, the mean square deviation, the
coordinates of the five characteristic points for the construction
of a normal distribution polygon, actual and normal distribution
schedules. The diameter of the tail section of the breaker-
distributor is measured by a micrometer. Diameter details
26 -0,52 mm. The details of the investigated party are processed
at the same adjustment of the machine without changing and
adjusting the tool. The measurement results are divided into
control groups at an interval of 0.1 mm (such groups are eight).
The obtained data are summarized in Table. 8.1.

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