Statistics
posted by Mike .
The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1 day at least once in the given year.
Year Percent 95% confidence interval
1997 21.4 20.822.0
1998 20.2 19.620.8
1999 20.3 19.621.0
2000 19.2 18.619.9
2001 20.0 19.420.6
2002 19.9 19.220.5
2003 19.1 18.519.8
For which years (or year) above could you reject the null hypothesis that more than 20% of U.S. adults had 5 or more drinks in 1 day, at the .05 significance level?

Whatever year the percent was less than the maximum of the confidence interval of 20%, 2000 and 2003.
Respond to this Question
Similar Questions

Statistics
According to a poll, 20% of adults smoke. In a random sample of 75 adults, 30 are smokers. Is this unusual? 
statistics
Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database, an estimate of the percentage of adults who have at some point in their life been told they have hypertension … 
statistics
A random sample of 80 youths and a second random sample of 120 adults showed that 18 of the youths and 10 of the adults had been ticketed for careless driving. Use a 1% level of significance to test the claim that youth have a higher … 
Statistics
The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had … 
statistics
According to an Internet posting, 80% of adults enjoy drinking beer. If a group of 3 adults is selected at random, find the probability that all of them enjoy drinking beer is: 
Statistics
One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet, at least occasionally. The results showed that 454 out of 478 adults aged 18  29 answered yes; 741 out of 833 adults aged 30 … 
Biostatitics
Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database, an estimate of the percentage of adults who indicated to have at some point of their life been tested … 
Statistics
In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 10% of the people in this sample had pinworm but the margin of error for the population estimate was too large. They want an estimate that is in error … 
Applied Stats
Based on the data collected by the National Centre for health Statistics and made available to the public in the Sample Adult database, it was found that the percentage of adults who have at some point in their life been told that … 
Statistics
Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database (A5), an estimate of the percentage of adults who have at some point in their life been told they have …