Monday!

Tonight, please complete the questions provided in class (and below)...

These will be the foundation for our new learning with chapter 19 tomorrow! I can't wait!

Investigating Confidence Intervals:A recent study (February 14,, 2012)by Reuters (New York) interviewed 21,248 people worldwide in an online survey (conducted by Ipsos).
• Of those interviewed, 59% said they were married or living with their partner.
• “South Africa reported the highest levels of domestic bliss, with 82 percent of settled South Africans saying nothing could make them happier than their partner.
• 45% of all singles stated finding a partner would bring them the greatest happiness
• Countries included: Argentina, Australia, Belgium, Brazil, Canada, China, France, Germany, Great Britain, Hungary, India, Indonesia, Italy, Japan, Mexico, Poland, Russia, Saudi Arabia, South Africa, South Korea, Spain, Sweden, Turkey, and the United States
1. You have been challenged with the task of estimating the population percentage of people married.
a. Identify the sample for this context.
b. Identify the population of interest.
c. Define p-hat, q-hat, n, and x (the number of people married in this study).

2. Check that the necessary conditions to apply a sampling distribution for proportions are met.

3. Sketch a Normal model for the sampling distribution for proportions. Label the 3 standard deviations above/below the mean (in this case, p-hat) with the “68/95/99.7 Rule” shown.