Can the difference in output be ascribed solely to chance

Reference no: EM13901667

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
hig h grade	117
medium grade	81
low grade	68

Can the difference in output be ascribed solely to chance?

Reference no: EM13901667

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