6. Suppose that you are interested in determining whether exposure to the organochlo-rine DDT, which has been used extensively as an insecticide for many years, is as-sociated with breast cancer in women. As part of a study that investigated this issue,blood was drawn from a sample of women diagnosed with breast cancer over a six-year period and from a sample of healthy control subjects matched to the cancerpatients on age, menopausal status, and date of blood donation. Each woman'sblood level of DDE-an important byproduct of DDT in the human body-wasmeasured, and the difference in levels for each patient and her matched control cal-m ad culated. A sample of 171 such differences has mean d = 2.7 ng/ml and standard de-viation Sd 15.9 ng/ml [11].=(a) Test the null hypothesis that the mean blood levels of DDE are identical forwomen with breast cancer and for healthy control subjects. What do youconclude?(b) Would you expect a 95% confidence interval for the true difference in popula-tion mean DDE levels to contain the value 0? Explain.

Given that: Sample size, n=171 Mean of the differences, d¯=2.7 Standard deviation of differences,…

Answered: 6. Suppose that you are interested in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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#32). Please show work and answers, need to see how it’s done. Thank you!
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2. [modified from page 76 #3] Coughlin et al. examined the breast and cervical screening practices of Hispanic and non-Hispanic women in counties that approximate the U.S. southern border region. The study used data from the Behavioral Risk Factor Surveillance System surveys of adults age 18 years or older conducted in 1999 and 2000. The table below reports the number of observations of Hispanic and non-Hispanic women who had received a mammogram in the past 2 years cross-classified with marital status. Marital Status Currently Married Divorced or Separated Widowed Never Married or Living As an Unmarried Couple Total Hispanic 319 130 88 41 578 Non-Hispanic 738 329 402 95 1564 Total 1057 459 490 136 2142 a) We select at random a subject who had a mammogram. What is the probability that she is widowed? b) We select at random a subject who had a mammogram and learn that she is Hispanic. With that information, what is the probability that she is married? e) Def two vents in this space that…
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