One possible effect of air polution is genetic damage. A study is undertaken to

Question

One possible effect of air polution is genetic damage. A study is undertaken to compare the effects of air polution in cities to that in rural areas. A random sample of dogs from each type of region is selected, with the number having a particular type of genetic mutation recorded. The data is summarized below: Location Mutation Urban Rural es 25 30 0 One part of the procedure for conducting a hypothesis test to decide if there is evidence of a difference in mutation rate between the two regions is to determine the expected cells counts for each table entry, under the assumption that there is no difference. Determine the expected counts, and fill them in below Expected Counts Location Mutation Urban Rural Yes No Next determine the value of the test statistic Test statistic: Then determine the range for the p-value of the test based on the chi-square-table

Explanation / Answer

applying chi square test:

from above:

expected counts:

test statistic :=0.228

p value =0.6333 (can you plase provide which are the option for range; if unavailable please apply 0.1<p value<1

option C is correct do not reject Ho

Observed O urban rural Total Yes 25 30 55 No 55 77 132 Total 80 107 187 Expected E=rowtotal*column total/grand total urban rural Total Yes 23.529 31.471 55 No 56.471 75.529 132 Total 80 107 187 chi square =(O-E)^2/E urban rural Total Yes 0.0919 0.0687 0.161 No 0.0383 0.0286 0.067 Total 0.130 0.097 0.228

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.