in urban, downtown venues. A magazine investigated whether there
has been a significanr suburban-to-urban shift in the location of major
sport facilities. In 1985 40% of all major sports facilities were located
downtown, 30%in central city, and 30% in suburban areas. In
contrast, of the 122 major sports franchises that existed in 1997, 65
were built downtown 28 in a central city, and 29 in a suburban area.
Complete parts a through e.
5. Each child in a sample of 63 low-income children was
administered a language and communication exam. The sentence
complexity scires had a mean of 7.63 and a standard deviation of
8.95. Complete parts a through d.
6.
Which hypothesis, the null or the alternative, is the status-quo
hypothesis?
7. Suppose the mean GPA of all students graduating from a
particular university in 1975 was 2.50. The register plans to look at
records of students graduating last year to see if the mean GPA has
changed. Define notation and state the null and alternative hypothesis
for this investigation.
8. A random sample of 100 observations from a population with
standard deviation 65 yielded a sample of 112. Complete parts a
through c.
9. For the α and observed significance level (p-value) pair, indicate
whether the null hypothesis would be rejected.
10. A study analysis recent incidents involving terrorist attacks. Data
on the number of individual suicide bombings that occurred in each of
20 sampled terrorist group attcks against a country is reproduced in
the data table below. An Excel/DDXL printout is shown to the right.
Complete parts a through e.
11. When planning for a new road to be used for tree harvesting,
planners must select the location to minimize tractor skidding
distance. The skidding distances (in meters) were measured at 20
randomly selected road sites. The data are given below. A logger
working on the road claims the mean skidding distance is atleast 398
meters. Is there sufficient evidence to refute this claim? Use α = 0.05.