Disease A was reported by local area hospitals in beginning in December 28, 1998.Initial symptoms were mainly bloody diarrhea, fever, weakness. Some later had fainting, hypotension.It was traced back to a potluck holiday party held in December 23 at a paper products sales company of 256 employees. All the employees attended that holiday party.One person died. The rest made full recoveries. No one who recovered from the illness showed any further symptoms. All data from the hospitals were compiled into the following chart: Date #cases Comment12/23/1998 0 Date of the holiday party.12/24/1998 0 12/25/1998 012/26/1998 012/27/1998 012/28/1998 212/29/1998 412/30/1998 812/31/1998 16 First patient in ICU for sepsis.1/01/1999 32 Second patient in ICU for sepsis.1/01/1999 30 The first patient expired in ICU.1/02/1999 26 The second patient transferred to regular ward.1/03/1999 18 The second patient discharged to home.1/04/1999 21/05/1999 01/06/1999 01/07/1999 0 21) What is the incubation period for disease A? 12/23/1998 – 12/28/1998 22) What was the incidence for all of year 1998 as a percent of those exposed? 23) What was the peak prevalence for the year 1998 as a percent of those exposed? 24) What was the peak prevalence for the year 1999 as a percent of those exposed? 25) What was the total incidence rate for disease A for combined 1998 and 1999 as a percent of those exposed?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Disease A was reported by local area hospitals in beginning in December 28, 1998.
Initial symptoms were mainly bloody diarrhea, fever, weakness. Some later had fainting, hypotension.
It was traced back to a potluck holiday party held in December 23 at a paper products sales company of 256 employees. All the employees attended that holiday party.
One person died. The rest made full recoveries. No one who recovered from the illness showed any further symptoms.
All data from the hospitals were compiled into the following chart:
Date #cases Comment
12/23/1998 0 Date of the holiday party.
12/24/1998 0
12/25/1998 0
12/26/1998 0
12/27/1998 0
12/28/1998 2
12/29/1998 4
12/30/1998 8
12/31/1998 16 First patient in ICU for sepsis.
1/01/1999 32 Second patient in ICU for sepsis.
1/01/1999 30 The first patient expired in ICU.
1/02/1999 26 The second patient transferred to regular ward.
1/03/1999 18 The second patient discharged to home.
1/04/1999 2
1/05/1999 0
1/06/1999 0
1/07/1999 0
21) What is the incubation period for disease A?
12/23/1998 – 12/28/1998
22) What was the incidence for all of year 1998 as a percent of those exposed?
23) What was the peak prevalence for the year 1998 as a percent of those exposed?
24) What was the peak prevalence for the year 1999 as a percent of those exposed?
25) What was the total incidence rate for disease A for combined 1998 and 1999 as a percent of those exposed?
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