QNT 561 Final Exam University of Phoenix New Courses
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7. A firm <strong>of</strong>fers routine physical examinations as part <strong>of</strong> a health service program for its<br />
employees. The exams showed that 8% <strong>of</strong> the employees needed corrective shoes, 15%<br />
needed major dental work, and 3% needed both corrective shoes and major dental work.<br />
What is the probability that an employee selected at random will need either corrective shoes<br />
or major dental work?<br />
a) .25<br />
b) 1.00<br />
c) .50<br />
d) .20<br />
8. When data is collected using a qualitative, nominal variable, what is true about a frequency<br />
distribution that summarizes the data?<br />
a) The upper and lower class limits must be calculated.<br />
b) The number <strong>of</strong> classes is equal to the number <strong>of</strong> variables plus 2.<br />
c) The “5 to the k rule” can be applied.<br />
d) A pie chart can be used to summarize the data.<br />
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