Please answer the following question using STAT:

6.

Car Window Skin Cancer? A study suggests that exposure to UV rays through the car window may increase the risk of skin cancer.' The study reviewed the records of all 1 050 skin cancer patients referred to the St. Louis University Cancer Center in 2004. Of the 42 patients with melanoma. the cancer occurred on the left side of the body in 31 patients and on the right side in the other 1 1. 1"Surprising Skin Cancer Risk: Too Much Driving," LiveScience com, May 7. 2010, reporting on Butler, S., and Fosko, S., "Increased Prevalence of Left-sided Skin Cancers". Journal of the American Academy of Dermatology. published online, March 12, 2010. (e) Is this an experiment or an observational study? O Experiment O Observational study eTextbook and Media (b) Of the patients with melanoma, what proportion had the cancer on the left side? Round your answer to three decimal places. p = 1 eTextbook and Media(c) Suppose the question of interest is whether melanomas are more likely to occur on the left side than on the right. State the null and alternative hypotheses. # PI " P2 #1 0.5 1 p HE1 Ho: Ivs Ha : eTextbook and Media (d) Is this a one-tailed or two-tailed test? O One-tail O Two-tail eTextbook and Media (e) A bootstrap 95 % confidence interval for the proportion of melanomas occurring on the left is 0.579 to 0.861. Use the confidence interval to predict the results of the hypothesis test in part (c). O Reject Ho- O Do not reject Ho- eTextbook and Media(f) A randomization distribution gives the p-value as 0.003 for testing the hypotheses given in part (c). What is the condusion of the test in the context of this study? O Do not reject Ho. there is evidence that melanomas are more likely on the left side. O Do not reject Mo. there is no evidence that melanomas are more likely on the left side. O Reject Ho. there is evidence that melanomas are more likely on the left side. O Reject Ho. there is evidence that melanomas are not more likely on the left side. O Reject Ho. there is no evidence that melanomas are likely on the left side. eTextbook and Media (e) The authors hypothesize that skin cancers are more prevalent on the left because of the sunlight coming in through car windows. (Windows protect against UVB rays but not UVA rays.) Do the date in this study support a conclusion that more melanomas occur on the left side because of increased exposure to sunlight on that side for drivers? O Yes O No eTextbook and MediaArsenic in Chicken A restaurant chain is measuring the levels of arsenic in chicken from its suppliers. The question is whether there is evidence that the mean level of arsenic is greater than 80 ppb, so we are testing /o: = 80 vs /:p > 80, where a represents the average level of arsenic in all chicken from a certain supplier. It takes money and time to test for arsenic so samples are often small. Suppose n = 6 chickens from one supplier are tested, and the level of arsenic (in ppb) are 66, 79, 85, 92, 96, 133. (e) What is the sample mean for the data? Round your answer to the nearest integer. * = 1 eTextbook and Media (b) Translate the original sample data by the appropriate amount to create a new dataset in which the null hypothesis is true. How do the sample size and standard deviation of this new date set compare to the sample size and standard deviation of the original dataset? O They are the same. O The standard deviation is the same but the sample size is different. O The sample size is the same but the standard deviation is different O They are different. eTextbook and Media (c) Write the six new data values from part (b) on six cards. Sample from these cards with replacement to generate one randomization sample. (Select a card at random, record the value, put it back, select another at random, until you have a sample of size 6, to match the original sample size ) Give the sample mean. * = i eTextbook and Media