1700 HW 3

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University of Texas *

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PH1700

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Statistics

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Apr 3, 2024

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Malaysia Marshall PH1700 HW 3 Homework 3 4.60 – The probability of at least 2 women going blind over a 1-year period is 0.44. 4.61 – The probability that a 30-year-old IDDM male patient will go blind in the next 10 years is 0.063. 4.62 – After 14.2 years, we would expect the cumulative incidence of blindness to be 10% among 30- year-old IDDM females. 1. Using the data from lead.csv: A. We are 95% confident that the true variance of Full-scale IQ is between (164.02, 270.92) degrees squared. We are also 95% confident that the true standard deviation is between (12. 81, 16.46) degrees. STATA Output : display invchi2(123, 0.975) – display invchi2(123, 0.025) – ci variance iqf (164.0615, 270.9189) B. The 95% confidence interval for the variance of each lead group has been listed below. Current Lead Exposure: We are 95% confident that the true variance of Full-scale IQ for the current lead exposure group is between (175.75, 331.91). The 95% CI for the standard deviation of IQ scores is We are 95% confident that the true variance of Full-scale IQ for the past lead exposure group is between (62.73, 204.35). For the standard deviation, we are 95% confident that the true standard deviation is between (7.92, 14.30) We are 95% confident that the true variance of Full-scale IQ for the group with no lead exposure is between (120.91, 417.18). We are 95% confident that the true standard deviation is between (10.99, 20.42) STATA Output : by lead_type: CI variance iqf 2. Using the information from 7.30, 7.31, and 7.32: A. We are 95% confident that the proportion of deaths from lung cancer in the sample is between (0.087, 0.49). B. The power of the test assessing the proportion of lung cancer deaths is 0.2142.
Malaysia Marshall PH1700 HW 3 Please see the images attached below for all work and calculations.
Malaysia Marshall PH1700 HW 3
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Malaysia Marshall PH1700 HW 3

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