A headache remedy is said to be 80% effective in curing headaches caused by simple nervous tension. An investigator tests this remedy on 100 randomly selected patients. Find the probability that: A. The first person to NOT be cured is the 5th person B. What is the expected number of patients who would be cured by the remedy?

Q: a. 27% students have passed their last year's degree examination. A random sample of 7 students is…

A: Given data ,PPass=27 %=0.27PFail=1-PPass=1-0.27=0.37If n=7P4≤x≤6=?

Q: In a plant, 10 out of 90 manufacturing products found to have a contamination. An investigation…

A: From the provided information, 10 out of 90 manufacturing products found to have a contamination in…

Q: According to the U.S. Coast Guard, sixty-five percent of boating accidents occur in light wind…

A: From the provided information, Sample size (n) = 20 Sixty five percent of boating accidents occur in…

Q: A recent study of cardiovascular risk factors reported that 30% of adults met criteria for…

A:

Q: 2002, approximately 39% of the people eligible to vote in mid-term elections voted. Suppose you have…

A: the number of trials n=7the number of successes x=0the probability of success on a single trial…

Q: The prevalence of osteoarthritis in the elderly among high-risk populations is approximately 6.3%.…

A: The objective of this question is to find the probability of identifying 20 or fewer cases of…

Q: A drug using to treat a particular disease shows 20% failure rate. If we select a sample of 8…

A:

Q: A certain neurotoxin has a 60% probability of killing a person depending on the host’s reaction and…

A: Let us denote  X=the number of people who survive  n=number of trials=25 Probability of killing=…

Q: In testing an HP printer, the Quality Inspector found that 25% of the printers fail to pass the test…

A: Obtain the probability that fewer than 4 fail to pass the test print. The probability that fewer…

Q: In a certain high school, the probability that a student drops out is 0.05, and the probability that…

A: The formula for a randomly selected student gets GED is

Q: In a large college, 20% of the students have experienced feelings of math anxiety. If you take a…

A: 20% of the students have experienced feelings of math anxiety.Sample size

Q: what is the probability all three would be smokers?

A: Let , X be the number of smokers Here , X→B(n=3 , p=0.20) The probability mass function of X is ,…

Q: In a recent year, 304 of the approximately 300,000,000 people in the United States were struck by…

A: a. In a recent year, 304 of 300,000,000 people in the United States were struck by lightning.

Q: A new drug cures 65% of the patients who take it. If it is given to 14 patients, what is the…

A:

Q: The probability that a person has blood type A is 0.3. Two persons are selected at random. What is…

A: GivenThe probability that a person has blood type A is 0.3

Q: on has blood type A is 0.3.Two persons are selected at random. What is the probability that neither…

A: Consider: E: The event that selected person has Blood type A. We have P(E)=0.3 The probability of…

Q: In a 2018 study, it was determined that 14% of Americans . In a separate study, it was determined 9%…

A: Probability indicates the chances of occurring an event. It lies between 0 and 1. Let A be the…

Q: One manufacturer claims that only 10% of its total production is defective. 28 items are randomly…

A: Let, X=the number of defectives n=number of trial=28  p=probability of success=10%=0.10   X follows…

Q: A certain insecticide kills 60% of all insects in a laboratory experiment.  A sample of 9 insects is…

A: The random variable  is the number of insects that will die.The number of trials: The probability of…

Q: In a certain country, 47 percent of the population are on a strict diet. In a sample of 20…

A:

Q: Assume 79% of all ducklings are adorable. You take a sample of 16 ducklings. What is the probability…

A: Given,n=16p=0.79q=1-pq=1-0.79=0.21A random variable X~Binomial(n=16 , p=0.79)P(X=x)=16x0.79x0.2116-x…

Q: In a certain Country, 47 percent of the population are on a strict diet. In a sample of 20…

A: It's binomial probability distribution

Q: In a certain high school, the probability that a student drops out is 0.1, and the probability that…

A:

Q: Of all 3- to 5-year-old children, 56% are enrolled in school. If a sample of 500 such children is…

A:

Q: In testing a certain kind of truck tire over rugged terrain, it is found that 39% of the trucks fail…

A: Given : Let X : Number of trucks have blowouts  p : 0.39 ( Probability of trucks fail to complete…

Q: A certain virus affects 0.7% of the population. A test used to detect the virus in a person is…

A: Probability is the numerical chance of occurrence of an event. we express this in terms of…

Q: It is estimated that 75% of adults use Twitter. If a sample of 6 adults is selected at random to…

A:

Q: A (blindfolded) marksman finds that on the average he hits the target 4 times out of 5. If he fires…

A: The probability is given as probability=favourable outcometotal numbe rof outcome The probability…