Write a careful summary of your overall findings. Intense or repetitive sun expo

Question

Write a careful summary of your overall findings.

Intense or repetitive sun exposure can lead to melanoma, a rare but severe form of skin cancer.
Patterns of sun exposure, however, differ between men and women.
A study of cutaneous malignant myeloma in the Italian population recorded the distribution of melanoma by body location for men and for women.
Figure 22.10 (below) displays the observed and expected counts for this study and the chi-square test from CrunchIt!

Write a careful summary of your overall findings.

Step 1:
FORMULATE: The chi-square tests the null hypothesis: There is no relationship between gender and body location.
SOLVE: Do the expected counts under the null hypothesis satisfy the conditions for using a chi-square test? Yes No


Step 2:
CONCLUDE: Which of the following is an appropriate summary of your overall findings? The study found a highly significant association between body location and gender.
Men were more likely to develop a melanoma on the lower limbs, whereas women were more likely to develop a melanoma on the trunk. There is no significant evidence of association between gender and body location. The study found highly significant evidence that there is no association between body location and gender. The study found a highly significant association between body location and gender.
Men were more likely to develop a melanoma on the trunk, whereas women were more likely to develop a melanoma on the legs. E& JMP Contingency Analysis of Location By Sex Freq: Count 4 o Contingency Table Location Count Row Expected Cell Chin2 Headlineck Trunk Upper limbs Lower limbs Unspecified 45 80 34 151 316 Female 14.24 25.32 10.76 47.78 1.90 106.694 47.2251 127.683 27.9852 6.4.1328 1.2927 0.1048 17.8069 0.0266 18.3989 139 36 14 32 5 226 Male 2.21 15.93 61.50 6.19 14.16 33.7749 91.3173 20.0148 76.3063 4.58672 25.7259 1.8075 0.0372 0.1466 24.8982 81 219 481 183 11 542 Tests N DF -LogLike RSquare (U) 0.0667 47.405283 542 Test Chisquare Prob Chisq 94.811 Likelihood Ratio

Explanation / Answer

In the table we see that p-value is less than level of significance. Reject the null hypothesis and conclude that there is a relationship between gender and body location

Step-1: No, the expected counts under the null hypothesis does not satisfy the conditions for using a chi-square test

Step-2: The study found a highly significant association between body location and gender.
Men were more likely to develop a melanoma on the trunk, whereas women were more likely to develop a melanoma on the legs.

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