Melanoma is a rare form of skin cancer that accounts for the great majority of s
ID: 3222736 • Letter: M
Question
Melanoma is a rare form of skin cancer that accounts for the great majority of skin cancer fatalities. Ultraviolet (UV exposure is a major risk factor for melanoma. Some body parts are regularly more exposed to the sun than others Would this be reflected in the distribution of melanoma locations on the body in a population? A study reported data for a random sample of 224 men diagnosed with melanoma on a known body location. Those results are as Assuming that these 4 body parts represent roughly equal skin areas, do the data support the hypothesis that melanoma occurs evenly on the body? o Ho: pHN pr puu puu. 1/2 versus HA: at least one pi is not 1/2 o Ho: pHN pr puu pLL 1/4 versus HA: at least one p is not 14 What are the expected counts for each body location? What is the x2 test statistic? Please use 3decimalplaces. What are the degrees of freedom? What is the p-value? Please use 4 decimal places. What is the conclusion? o Since the p value 0.05. there is signifcantevidencethat melanomas in men are evenly spread over all four body locations. o Since the p-value >005, there is not signifcant evidence that melanomas in men are evenly spread over all four body locations. o Since the p-value 0.05. there is significant evidence that melanomas in men are not evenly spread over all four body locations. o Since the p-valueExplanation / Answer
from above: Ho: PHN=PT=PuL=PLL =1/4 vs Ha: at least one pi is not equal to 1/4
expected count =56
X2 test stat =167.607
degree of freedom =3
p value=0.0001
conclusion : option D , since p vlaue <0.05 ; there is significant ..........