Posted by **Anonymous** on Monday, January 14, 2013 at 6:28pm.

Prospective Cohort Study

The following tables show the crude and sex-specific results from a Prospective Cohort Study that examines the association between a binary exposure (E) and the development of a disease (D) during 20 years of follow-up.

Full Data:

Sex-Specific Data:

Males

1. Assume that this cohort is a simple random sample from a broader population of interest. Model the number of disease positive individuals among all exposed individuals in the sample using the binomial distribution with probability of disease ; and model the number of disease positive individuals among the unexposed in the sample using a binomial distribution, with probability of disease . Estimate , the proportion of exposed individuals who are disease positive, and provide an exact 95% confidence interval.

Estimated Proportion:

unanswered

Confidence Interval:

Lower Bound:

unanswered

Upper Bound:

- statistics -
**jhikjhak**, Tuesday, January 15, 2013 at 12:10pm
Use these data to solve the above problem, it will become easier

Full data

D+ D- Total

E+ 30 270 300

E- 20 180 200

Total 50 450 500

Male

D+ D- Total

E+ 12 108 120

E- 8 72 80

Total 20 180 200

Female

D+ D- Total

E+ 18 162 180

E- 12 108 120

Total 30 270 300

- statistics -
**dani**, Tuesday, January 15, 2013 at 1:53pm
1. 2.5

- statistics -
**Gaurav**, Wednesday, January 16, 2013 at 12:26pm
Please do not answer these questions, It is not a help. It is challenge for a new education system, I think this should be immediately stopped to cheer at least those who are working hard to learn

- statistics -
**mark**, Thursday, January 17, 2013 at 9:35am
these numbers are wrong. did you change the numbers???

where are you getting this data???

- statistics -
**Anonymous**, Sunday, January 20, 2013 at 4:13am
please help, today is the last date to attempt for this

- statistics -
**Ishika Patel, Goa**, Sunday, January 20, 2013 at 4:41pm
How do you find confidence interval for the first one(first part)?

- statistics -
**lili**, Sunday, January 20, 2013 at 7:00pm
i have first part. If u have a second, wy can exchange.

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