Homework SourseThe average size of a home in 2003 was 2320 square feet acco
The average size of a home in 2003 was 2320 square feet according to the National Association of Home Builders and reported in USA Today Snapshots (November 27, 2004). The homebuilders of a northeastern city believe that the average size of homes continues to increase each year. To test their claim, a random sample of 45 new homes was selected; they revealed an average of 2490 square feet. Assume that the population standard deviation is approximately 450 square feet.
Problem to solve: Is there evidence that the average size has increased since the 2003 ?gure? Use a 0.05 level of signi?cance.
What is the parameter of interest?
a.
The true average of all the homes in the northeastern city
b.
All the homes in the northeastern city
c.
The average size of the sampled homes in the northeastern city
d.Whether or not the average home size has increased since 2003 figure?
| a. | The true average of all the homes in the northeastern city |
| b. | All the homes in the northeastern city |
Solution
Answer: d.Whether or not the average home size has increased since 2003 figure?
