MA110 FINITE MATHEMATICS SUMMER 2001
July 2001 QUIZ 6 Jellett
SCORE
NAME:..........................................
/20
Margin of Error formula: MOE=zα/2
2√n
1. A survey asked, “How important is it to you to buy products that are made in
America?” Of the 600 Americans surveyed, 450 responded, “It is important”. Give
the sample proportion and find the margin of error associated with the poll,
(i) with a 90% level of confidence
(ii) with a 95% level of confidence
2. A survey asked, “Do you support capital punishment?” Of the 1000 Americans
surveyed, 750 responded “No”. Give the sample proportion and the margin of error
associated with the poll,
(i) with an 80% level of confidence
(ii) with a 98% level of confidence