Structure the above information using a contingency table

Reference no: EM13639060

An automated blood-pressure machine correctly classifies 87% of hypertensives as having hypertension (high blood pressure), and also classifies 22% of healthy people as having hypertension. The machine is being considered for use in a blood pressure screening programme in an adult population in which 20% of persons have hypertension.

(a) Structure the above information using a contingency table. Take care to complete all marginal totals as well as the body of the table.

(b) What proportion of people that the machine classifies as hypertensive would actually have hypertension?

(c) Consider those who would be classified by the machine as having normal blood pressure. If we chose one of these people at random, what is the chance that the selected person would actually be hypertensive?

(d) What would the machine do better in this population: show who has hypertension, or show who doesn't have it? Justify your answer.

Reference no: EM13639060

Questions Cloud

The work output of the engine is 9105 j in each cycle : an ideal gas for which cv3r2 is the working substance of a carnot engine. during the isothermal expansion the volume

The refrigerant-134a changes from saturated liquid to : consider a carnot heat-engine cycle executed in a closed system using 0.02kg of refrigerant-134a as the working fluid.

Develop a 98 percent confidence interval for the population : warren county telephone company claims in its annual report that the typical customer spends 61 per month on local and

An irregular neutral conductor has a hollow cavity inside : an irregular neutral conductor has a hollow cavity inside of it and is insulated from its surroundings. an excess

Structure the above information using a contingency table : an automated blood-pressure machine correctly classifies 87 of hypertensives as having hypertension high blood pressure

The surface charge density on an infinite charged plane is : the surface charge density on an infinite charged plane is - 2.50 x 10-6 cm2. a proton is shot straight away from the

What is the standard emf you would obtain from a cell : what is the standard emf you would obtain from a cell at25oc using an electrode in which i-nbspaq isin contact with i2s

Methanol also called methyl alcohol is the simplest alcohol : methanol also called methyl alcohol is the simplest alcohol. itis used as a fuel in race cars and is a potential

Conduct a test of hypothesis to determine whether the mean : conduct a test of hypothesis to determine whether the mean payroll of the teams was different from 80 million. .05 is

User Account

All Pages