According to a CNN poll released in January of 2010, 56 percent ...

[craiczarry]

According to a CNN poll released in January of 2010, 56 percent of the public opposed the stimulus bill, with 42 percent supportive of the plan. The CNN/Opinion Research Corporation poll was conducted January 8-10, with 1,021 adult Americans questioned by telephone. The survey's sampling error was reported as plus or minus 3 percentage points. Provide an interval of numbers that is 95 certain to cover the true percentage of Americans who supported the bill in 2010 .

Question 2

According to a CNN poll released in January of 2010, 56 percent of the public opposed the stimulus bill, with 42 percent supportive of the plan. The CNN/Opinion Research Corporation poll was conducted January 8-10, with 1,021 adult Americans questioned by telephone. The survey's sampling error was reported as plus or minus 3 percentage points. What is the approximate margin of error for this survey? Did the story report the correct margin of error?

[orangecrush]

Answer to Question 1

42  3 or (39, 45) or (0.39, 0.45).

Answer to Question 2

According to the report plus or minus 3 percentage points. Using the formula, we get 0.0313 . So the reported margin of error was correct.

[craiczarry]

Gracias!

[amandalm]

Excellent