1) Suppose it is known that 4.09% of the population suffers from a particular disease. A blood test has a 87.8% chance of identifying the disease for diseased individuals, but also has a 11.03% chance of falsely indicating that a healthy person has the disease.
If your blood test is positive, what is the chance that you have the disease?
Round your answer to the nearest hundredth.
2)
A ball is chosen at random from a bag containing 205 balls that are either red or blue and either dull or shiny. There are 10 red shiny balls and 93 blue balls.
What is the probability of the chosen ball being shiny conditional on it being red?
Round to the nearest hundredth.
3)
A ball is chosen at random from a bag containing 214 balls that are either red or blue and either dull or shiny. There are 9 red shiny balls and 119 blue balls.
What is the probability of the chosen ball being dull conditional on it being red?
Round to the nearest hundredth.
4)
Suppose it is known that 6.9% of the population suffers from a particular disease. A blood test has a 80.26% chance of identifying the disease for diseased individuals, but also has a 7.25% chance of falsely indicating that a healthy person has the disease.
What is the probability that a person will have a positive blood test?
Round your answer to the nearest hundredth.
1) Suppose it is known that 4.09% of the population suffers from a particular disease. A...
It’s known that 2 % of people in a certain population have the disease. A blood test gives a positive result (indicating the presence of disease) for 95% of people who have the disease, and it is also positive for 3% of healthy people. One person is tested and the test gives positive result. a. If the test result is positive for the person, then the probability that this person actually has a disease is _________ b. If the test...
1) Suppose a bag contains 50 red balls, 30 green balls and 20 blue balls. (a) If you draw 2 balls at random without replacement, what is the probability that they are red and green? (b) If you draw 3 balls at random without replacement, what is the probability that all 3 are of different colour? (c) If you draw 3 balls at random without replacement, what is the probability that you draw at least 1 red ball? 2) A...
1. For the choirmaster. A psalm of David. 2. Hear.my.troubles, O God. Kesp.me.safe from terror, The Department of Health of a certain state estimates a 10% rate of HIV for the general population Tests for HIV are 95% accurate in detecting both true negatives and true positives. Random see 5000 "at risk people and 20,000 people from the general population results in the following table. Use the table below to complete parts (a) through (e). at risk population and a...
2) Populations versus samples. For each statement, answer with either population, sample, or both. A) The complete set of information. B) A portion, not all, of the information. C) Has the potential to be biased or misleading. D) Measured or summarized with parameters. E) Measured or summarized with statistics. 3) Descriptive versus inferential statistics. For each statement, answer with either descriptive or inferential statistics. A) Facts about samples. B) Educated guesses about populations based on samples. C) The world population...