Description Usage Source Examples

A factory has four machines A, B, C, D. The quality control process identifies defects from each machine.

The `iqd`

dataset has four columns, one per machine; entries
correspond to the numbers of defects produced by each machine. The
`NA`

entries in a row indicate that a particular machine is
switched off.

The null hypothesis would be that there exist four non-negative
numbers *p_1,p_2,p_3,p_4* with sum 1 such that the probability of
a defect arising from machine *i* is proportional to *p_i* if
it is switched on, and zero otherwise.

It is suspected that machine D is causing some sort of interference with machine A; machine A produces very few defects when D is switched off.

The `shifts`

dataset includes only three machines, A, B, C.
There are three columns, one per machine; and three rows, one per
operator (S1, S2, S3). On S1's shift, machine C was out of
commission.

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Data kindly supplied by Acme Corporation (widget division)

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