A pollster interviewed 600 university seniors who owned credit cards. She reported that owned 290 owned Goldcard, 300 had supercard, and 270 had Thrifcard. Of those seniors the report said that 80 owned only a Goldcard and a Supercard, 70 owned only a Goldcard and Thriftcard, 60 owned only a Supercard and a Thrifcard, and 50 owned all three cards. When the report was submitted for publication in the local campus newspaper, the editor refused to publish it, claming the poll was not accurate. Was the editor right? Why or why not?
A pollster interviewed 600 university seniors who owned credit cards. She reported that owned 290 owned Goldcard, 300 had supercard, and 270 had Thrifcard. Of those seniors the report said that 80 owned only a Goldcard and a Supercard, 70 owned only a Goldcard and Thriftcard, 60 owned only a Supercard and a Thrifcard, and 50 owned all three cards. When the report was submitted for publication in the local campus newspaper, the editor refused to publish it, claming the poll was not accurate. Was the editor right? Why or why not?
Solution Summary: The author analyzes how a pollster interviewed 600 university seniors who owned credit cards.
A pollster interviewed
600
university seniors who owned credit cards. She reported that owned
290
owned Goldcard,
300
had supercard, and
270
had Thrifcard. Of those seniors the report said that
80
owned only a Goldcard and a Supercard,
70
owned only a Goldcard and Thriftcard,
60
owned only a Supercard and a Thrifcard, and
50
owned all three cards. When the report was submitted for publication in the local campus newspaper, the editor refused to publish it, claming the poll was not accurate. Was the editor right? Why or why not?
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