Problem Set 2

A researcher is interested in the potential relationship between the presence of children and pet ownership. They believe that whether or not there are children in a household may be associated with pet ownership. They randomly selected 146 adults in the United States, and found that 44 reported that there were children in the household, while 102 reported that there were not children in the household. Of the 44 individuals who reported children in the household, 26 reported that they also owned a pet. Of the 102 individuals reported that there were no children in the household, 71 reported that they owned a pet.

2.1Construct a two-way table (including labels for each variable, and the row/column totals) for this data.

2.2Calculate the relative risk.Show your work, and round to two decimal places.

2.3Interpret the relative risk in the context of the problem (Note: this isnotwhether you reject or fail to reject. What does the number you calculated mean?)

2.5Calculate the standardized statistic.Show your work,and round to two decimal places

2.6Interpret the standardized statistic in the context of the problem (Note: this not whether you reject/fail to reject the null. What does the number mean?)

2.8State your conclusion in the context of the problem (Hint: what would be the null and alternative hypotheses?)

A researcher is interested in if a cottonwood tree's circumference (in inches), measured at 4.5 feet above the ground, can be used to estimate its age (in years). They recorded the diameter and age of 42 trees and produced the plot below.

8 O O 8 O O O Age O O O oo O O O O O O O O O O O O O O O O OO O O O O O O O O 40 50 60 70 80 Circumference