Here's your next reading assignment. Read Sections 5.1-5.2 in your textbook and answer the following questions by 8 a.m., Monday, April 2nd. Be sure to login (using the link near the bottom of the sidebar) to the blog before leaving your answers in the comment section below.
- Suppose you've developed a vehicle back-up camera and you suspect that it will help drivers parallel park more quickly. You have twelve volunteers parallel park an SUV without the camera, and then you have a different twelve volunteers parallel park the same SUV while using the camera. You compare the time it takes each group of volunteers to park the SUV. Are these samples paired or unpaired? Explain your answer.
- Suppose that the drinking water in two cities, Phoenix and Las Vegas, is sampled and tested for arsenic. The average arsenic level in the 50 Phoenix samples was 12.5 parts per billion (ppb) with a standard deviation of 7.63. The average arsenic level in the 50 Las Vegas samples was 15.4 ppb with a standard deviation of 15.3. Conduct a hypothesis test using these data to determine if the arsenic levels in these two cities are different.
- Answer the question posed in Exercise 5.14 on page 201.
- What question do you have about the reading?