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Doll And Hill first estimated the proposition that smoking was a risk factor for the lung cancer in a case-control study (Doll and Hill, 1950). They discovered that, of 650 men having lung cancer (cases), 645 had smoked at some time, in comparison with the 625 of 650 men without lung cancer (control).
a) Design a clearly labelled and appropriate 2 x 2 table to display these data.
b) How many times a smoker is more prone to develop lung cancer rather than a non-smoker?
c) Determine the proportion of the lung cancers attributable to smoking among
i) smokers and
ii) the whole population.
d) State what these measures are known as and how does their interpretation differ?
If the mutation is in mitochrondrial DNA, will the four haploid cells probably be all Pyr-, all Pyr+, or a combination? What if the mutation is in nuclear DNA. Why is mitochondrial function critical for growing on pyruvate.
If wind blows at 35 m/s^2 over the house, what is net force on the roof if its area is 240 square meters and the roof is flat? Show all work, with equation and substitution units.
An electric field with a magnitude of 170 N/C exists at a spot that is 0.11 m away from a charge. At a place that is 0.36 m away from this charge, what is electric field strength.
Do you think biochemical testing must be recommended to detect the deleterious gene in Mrs. Lehman. Which one increased their alveolar ventilation, or do they stay the same? Why with appropriate reason.
Human population doesn't follow a j-shaped curve since humans are able to consciously limit the number of offspring that they produce, which is what usually happens after a population industrializes.
What is the phenotypic ratio you would expect to see in the F2 generation if you were following a sex-linked trait? An autosomal trait? Two autosomal dominant characters (dihybrid cross).
After reading these articles, do you believe that it is the industry's fault or should the burden of responsibility be on the consumer who is making the food choices? You should provide a specific opinion to earn full credit.
Recognize the strengths and weakness of Callaway, TaylorMade, Titleist, Ping, and Nike. Which company has a competitive benefit in the marketplace? Why describe reason.
The bacteria are allowed to grow overnight and are streaked on a plate using the technique that produces isolated colonies that are clones of the original. Samples of these colonies are then grown in four different media: nutrient broth plus ampicill..
What communication channels may you choose for these different departments when delivering messages about the new accounting software system? Why would you choose these specific channels.
If relatively small carbonaceous chondrites from space were a significant source of Earth's original amino acids, then which two of these would have been most important in permitting their organic materials to survive impact with Earth.
What progeny will result from the cross of blue with blue. Which would yield blue fowl, how must you proceed.
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