Euthanasia of healthy but unwanted pets by animal…
Euthanasia of healthy but unwanted pets by animal shelters is believed to be the leading cause of death for cats and dogs. A study designed to find factors associated with bringing a dog to an animal shelter compared data on dogs that were brought to the Humane Society of Saint Joseph Country in Mishawaka, Indiana, with controls from the same county that were not brought in. One of the factors examined was the source of the dog; the categories were private owner or breeder, pet store, and other (includes born in home, stray, and obtained from a shelter). Here are the data. Source Group Private Pet Store Other Cases 188 7 90 Controls 518 68 142 Use a significance test to examine the association between the two variables at
Read DetailsIn a Christmas tree survey, respondents who had a tree durin…
In a Christmas tree survey, respondents who had a tree during the holiday season were asked whether the three was natural or artificial. Respondents were also asked if they lived in an urban area or in a rural area. Of the 421 households displaying a Christmas tree, 160 lives in rural areas and 261 were urban residents. The tree growers want to know if there is a difference in preference for natural trees versus artificial trees between urban and rural households. Here are the data: Population n X (natural) Rural 160 64 Urban 261 89 a. Set up the appropriate null and alternative hypotheses assuming that we have no prior information suggesting that one population would have a higher preference that the other (1 pt). b. Test the null hypothesis at =.05. Give the test statistic and the p-value. (4 pts) c. State and interpret your conclusion (1 pt). d. Construct and interpret a 95% confidence interval for the difference in their preference (2 pts).
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