Monday
November 24, 2014

Homework Help: Statistics

Posted by Bill on Tuesday, March 26, 2013 at 8:58pm.

According to a recent pole only 21% of Americans were satisfied with the direction the U.S. is heading. To investigate the reliability of the report an independent polling organization surveyed 500 Americans and inquired as to whether or not they were satisfied with the way things are progressing in the U.S. The response indicated 117 of 500 were satisfied.
A. Calculate a 95% confidence interval to estimate the true proportion of Americans who are currently satisfied with the direction the U.S. is heading .
B. If in the future the polling organization wanted to conduct a 99% confidence interval to estimate the true proportion of Americans who are currently satisfied with the direction the U.S. is heading and have the margin of error to be no larger than 3%, how many Americans should be included in the survey.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math/Statistics - Three hundred twelve viewers were asked if they were satisfied...
statistics - If an instrument requires some professional judgments in scoring, ...
statistics - A recent report stated "Based on a sample of 250 truck drivers, ...
Validity/Reliability - I have a test that accurately predicts who will learn ...
Statistics - If a research report contains the results of an independent ...
probability & statistics - Q: if A and B are independent events, how many of the...
pre statistics - In a recent health study it was claimed that 18% of americans ...
Accounting - According to the Sarbanes-Oxley Act, the responsibility for issuing...
physics - Betty Bodycheck (mB = 60.0 kg, vB = 22.0 km/h in the positive x-...
physics - Betty Bodycheck (mB = 50 kg, vB = 22.0 km/h in the positive x-...

Search
Members