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In a prospective study, Data collected extensive information on incidence of coronary heart disease (CHD) among smoker and non-smoker individuals.
The table below summarizes the results
Risk factor
Cases of CHD
Non cases of CHD
Total
Smoker
84
2916
3000
Non smoker
87
4913
5000
(a) What is the absolute risk of CHD among smokers?
(b) What is the relative risk of CHD when men smoke extensively compared to men who do not smoke?
(c) Interpret this relative risk.
mike dreskin manages a large los angeles movie theater complex called cinema l ll lll lv. each of the four auditoriums
Major League Baseball's World Series is a maximum of seven games, with the winnerbeing the first team to win four games.
use the given data to find the minimum sample size required to estimate a population or proportion or percentage.margin
it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that
Let Ck be the smallest σ-algebra for which Uj is measurable for all j ≤ k. Show that {Uk, Ck }k≤-1 is a reversed martingale and find its limit as k → -∞. Let C-∞ := nk≤-1 Ck . Is Y equal a.s. to a variable measurable for C-∞?
The table at the bottom of the page shows how the history and economics scores of 25 students are distributed. Use the method of Exercise 32 to determine the value of r, replacing the row headings by the corresponding class marks (midpoints) 23, 2..
Using the raw measurement data presented below, calculate the t value for independent groups to determine whether or not there exists a statistically significant difference between the salaries of female and male human resource managers.
if z is a standard normal random variable compute the following probabilities by standardizing.1. what is p-2ltzlt1.82.
a power company is considering damming a river that has a steady flow rate of 175 m3s. at the location where the dam
The scatterplot shows the relationship between economic status measured as a percentage of children in a neighborhood receiving reduced-fee lunch at school and the percentage of bike riders in the neighborhood wearing helmets.
three couples and two single individuals have been invited to a party. assume independence of arrivals to the party and
Your fixed costs are presently $500,000 with a variable cost per unit of $25 per unit and a sales price of $43 Your options are: Increase your fixed costs by $50,000 which will decrease variable costs by $8 per unit.
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