VCU STAT 210  Test 6 Practice Test #1 (3 pages)
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Test 6 Practice Test #1
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 3
 School:
 Virginia Commonwealth University
 Course:
 Stat 210  Basic Practice of Statistics
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Test 6 Practice Test 1 Lymphoma is a cancer in the lymphatic cells of the immune system Typically lymphomas present as a solid tumor of lymphoid cells Treatment might involve chemotherapy and in some cases radiotherapy and or bone marrow transplantation and can be curable depending on the histology type and stage of the disease These malignant cells often originate in lymph nodes presenting as an enlargement of the node a tumor There are many types of lymphomas and in turn lymphomas are a part of the broad group of diseases called hematological neoplasms 1 One category of lymphoma is non Hodgkin lymphoma which is the classification of many different types Of interest is to estimate the mean survival time in years of a patient diagnosed with non Hodgkin lymphoma For this problem only assume that the standard deviation of the survival times for all patients diagnosed with non Hodgkin lymphoma is 9 2 years What is the minimum number of non Hodgkin lymphoma patients that would need to be selected to allow the calculation of a 95 confidence interval with margin of error no greater than 3 5 years Please circle your final answer 2 A simple random sample of 51 non Hodgkin lymphoma patients was selected and their survival time from initial diagnosis to death was determined for each The mean survival time for this sample of 51 patients was 17 8 years with a standard deviation of 4 6 years and the distribution was heavily skewed to the right since a few patients had lived many years between initial diagnosis and death If appropriate use this information to calculate and interpret a 95 confidence For questions 3 and 4 the answer choices for both multiple choice questions are as follows A The margin of error would increase and the width would decrease B The margin of error would decrease and the width would increase C Neither the margin of error nor the width would be affected D Both the margin of error and the width would increase E Both the margin of error and the width would
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