Can the difference in output be ascribed solely to chance

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Reference no: EM13903180

The past output of a machine indicates that each unit it produces will be

top grade	with probability	.40
high grade	with probability	.30
medium grade	with probability	.20
low grade	with probability	.10

A new machine, designed to perform the same job, has produced 500 units with the following results.

top grade	234
high grade	117
medium grade	81
low grade	68

Can the difference in output be ascribed solely to chance?

Reference no: EM13903180

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