Questions: (1) What sampling plan did Doll and Hill utilize? A) Sampling based on exposure B) Sampling based on disease status C) Sampling independent of exposure and disease status D) Cross-sectional sampling (2) Doll and Hill would like to test if the relationship they are observing between smoking and lung cancer is beyond what would be expected by chance if there really was no relationship between these two factors. Which of the following null hypotheses would be incorrect to use here? (A) In the population of interest, smoking and lung cancer are independent. (B) In the population of interest, smoking and lung cancer are not associated. (C) In the population of interest, the probability of smoking among those with lung cancer is the same as the probability of smoking among those without lung cancer. (D) In the population of interest, the probability of lung cancer among smokers is the same as the probability of lung cancer among non-smokers. (3) Doll and Hill would like to test if the relationship they are observing between smoking and lung cancer is beyond what would be expected by chance if there really was no relationship between these two factors. Compute the value of the Chi-Squared Test Statistic for them. Round your answer to one decimal place.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

Questions:

(1) What sampling plan did Doll and Hill utilize?

A) Sampling based on exposure

B) Sampling based on disease status

C) Sampling independent of exposure and disease status

D) Cross-sectional sampling

(2) Doll and Hill would like to test if the relationship they are observing between smoking and lung cancer is beyond what would be expected by chance if there really was no relationship between these two factors. Which of the following null hypotheses would be incorrect to use here?

(A) In the population of interest, smoking and lung cancer are independent.

(B) In the population of interest, smoking and lung cancer are not associated.

(C) In the population of interest, the probability of smoking among those with lung cancer is the same as the probability of smoking among those without lung cancer.

(D) In the population of interest, the probability of lung cancer among smokers is the same as the probability of lung cancer among non-smokers.

(3) Doll and Hill would like to test if the relationship they are observing between smoking and lung cancer is beyond what would be expected by chance if there really was no relationship between these two factors. Compute the value of the Chi-Squared Test Statistic for them. Round your answer to one decimal place.

The data below come from one of the first studies of the link between lung
cancer and smoking (Doll & Hill, Br. Med. J., 1950). Doll and Hill asked patients
admitted to the hospital for lung cancer in the preceding year about their
smoking behavior. For each of the lung cancer patients admitted, they recorded
the smoking status of a non-cancer patient at the same hospital who was of the
same gender and age group.
Smoker
Non-Smoker
Total
Lung Cancer
688
21
709
No Lung Cancer
650
59
709
Total
1338
80
1418

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