Single 160 60 Marital status

A Guide to SQL
9th Edition
ISBN:9781111527273
Author:Philip J. Pratt
Publisher:Philip J. Pratt
Chapter2: Database Design Fundamentals
Section: Chapter Questions
Problem 17RQ: List the changes you would need to make to your answer for Question 11 if the requirements change so...
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(d)
A sample of 800 workers indicated whether they are single or married and
whether they work morning shift, afternoon shift, or night shift. The information
obtained appears in the following two-way classification table.
Marital status
Single
Married
Morning
160
360
Afternoon
60
100
Work shift
Night
80
40
(i)
Explain the following terms based on 2(c) above.
ORC:
ERC :
Transcribed Image Text:(d) A sample of 800 workers indicated whether they are single or married and whether they work morning shift, afternoon shift, or night shift. The information obtained appears in the following two-way classification table. Marital status Single Married Morning 160 360 Afternoon 60 100 Work shift Night 80 40 (i) Explain the following terms based on 2(c) above. ORC: ERC :
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