In recent years more people have been working past the age of 65. In 2005, 27% of people aged 65-69 worked. A recent report from the Organization for Economic Co-operation and Development (OECD) claimed that the percentage working had increased (USA Today, November 16, 2012). The findings reported by the OECD were consistent with taking a sample of 600 people aged 65-69 and finding that 180 of them were working.

a.Develop a point estimate of the proportion of people aged 65-69 who are working (to 2 decimals).

b.Set up a hypothesis test so that the rejection ofH0will allow you to conclude that the proportion of people aged 65-69 working has increased from 2005.

H0:p-

Ha:p-

c.Conduct your hypothesis test using=.05.

p-value-

What is your conclusion?