A certain drug is found to be effective 60% of the time. Find the probability of...
A certain drug is found to be effective 60% of the time. Find the probability of succesful treatment in two out of five cases.
.2410
.0400
.1740
.2304
.0500
Homework Answers
Answer: .2304
We are given
n = 5
p = 0.6
q = 1 – 0.6 = 0.4
P(X=x) = nCx*p^x*q^(n – x)
P(X=2) = 5C2*0.6^2*0.4^(5 – 2)
P(X=2) = 10*0.6^2*0.4^3
P(X=2) = 0.2304
Add Answer to:
A certain drug is found to be effective 60% of the time.
Find the probability of...
5 whiche a long period of time a certain drug has been effective in 80% of...
5
whiche a long period of time a certain drug has been effective in 80% of the cases in what is the probabil it has b een prescribed. If a doctor is now administering this drug to five patients, ity that it will be effective for 3 of them? (6 point)
effective in 90% of the cases in nistering this drug to five patients, r of them?...
effective in 90% of the cases in nistering this drug to five patients, r of them? Show the result of 3 5. Over a long period of time a certain drug has been which it has been prescribed. If a doctor is now admi what is the probability that it will be effective for fou probability calculations and circle one of the multiple choice answers. (6 points)
A new drug has been found to be effective in treating 50% of the people afflicted...
A new drug has been found to be effective in treating 50% of the people afflicted by a certain disease. If the drug is administered to 800 people who have this disease, what is the standard deviation of the number of people for whom the drug can be expected to be effective? 9. 10. Find the value of the probability of the standard normal variable Z corresponding to the shaded area under the standard normal curve. P(0.3 <Z1.85) 0.3 1.85
A new drug has been found to be effective in treating 80% of the people afflicted...
A new drug has been found to be effective in treating 80% of the people afflicted by a certain disease. If the drug is administered to 300 people who have this disease, what are the mean and the standard deviation of the number of people for whom the drug can be expected to be effective? (Round your standard deviation to two decimal places.) mean: _____ people standard: _______ deviation people
4. In developing the vaccine of HIV, neither Alvac nor Aidsvax was found to be effective....
4. In developing the vaccine of HIV, neither Alvac nor Aidsvax was found to be effective. Scientists are exploring whether using Alvac as a primer and Aidsvax as a booster will be effective for HIV. The Study is conducted in Thailand with 16,395 individuals from the general (not high-risk) popula- tion. • 74 HIV cases reported in the 8198 individuals receiving placebos. • 51 HIV cases reported in the 8197 individuals receiving the treatment. Let pı and p2 denote the...
a new policy for certain social groups is known to be effective in 31% of the...
a new policy for certain social groups is known to be effective in 31% of the groups administered. (a) Out of 25 selected groups who have social problems, what is the mean (expected value) and standard deviation of groups for whom the policy will be effective? (b) Out of 25 groups selected, what is the probability that the number of groups for whom the treatment will be effective is at least 5? (c) Suppose that the policy was successful for...
5.3.65 Question Help Prominfestation, commonly found in children can be treated with a drug that is...
5.3.65 Question Help Prominfestation, commonly found in children can be treated with a drug that is effective in 30% of cases Suppose that three chat given the drug complete parts through col below with purwo ndestation are A ach bral consists of observing whether the child is not cured of the pinworm infestation by the drug and has a possible outcomes, other not cured or Cred The results are independent. Supposing a c h at the chan cured the success...
The number of defaults in one year within a certain portfolio of bonds is found to...
The number of defaults in one year within a certain portfolio of bonds is found to be a Poisson random variable with parameter λ = 7 (i.e., the portfolio has an expectation of 7 defaults per year). (a) Find the probability that the bond portfolio will have fewer than 3 defaults during the upcoming year. (b) Describe the distribution of the continuous random variable representing the time between successive defaults. (c) Find the expected time between successive defaults. (d) Calculate...
A box in a certain supply room contains three 40-W lightbulbs, seven 60-W bulbs, and five...
A box in a certain supply room contains three 40-W lightbulbs, seven 60-W bulbs, and five 75-W bulbs. Suppose that three bulbs are randomly selected. (Round your answers to four decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 75-w2 079 (b) What is the probability that all three of the selected bulbs have the same rating? (c) What is the probability that one blb of each type is selected? d) Suppose now...
A box in a certain supply room contains four 40-W lightbulbs, three 60-W bulbs, and five...
A box in a certain supply room contains four 40-W lightbulbs, three 60-W bulbs, and five 75-W bulbs. Suppose that three bulbs are randomly selected. (Round your answers to four decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 75-W? (b) What is the probability that all three of the selected bulbs have the same rating? (c) What is the probability that one bulb of each type is selected? (d) Suppose now that...
5
whiche a long period of time a certain drug has been effective in 80% of the cases in what is the probabil it has b een prescribed. If a doctor is now administering this drug to five patients, ity that it will be effective for 3 of them? (6 point)
effective in 90% of the cases in nistering this drug to five patients, r of them? Show the result of 3 5. Over a long period of time a certain drug has been which it has been prescribed. If a doctor is now admi what is the probability that it will be effective for fou probability calculations and circle one of the multiple choice answers. (6 points)
A new drug has been found to be effective in treating 50% of the people afflicted by a certain disease. If the drug is administered to 800 people who have this disease, what is the standard deviation of the number of people for whom the drug can be expected to be effective? 9. 10. Find the value of the probability of the standard normal variable Z corresponding to the shaded area under the standard normal curve. P(0.3 <Z1.85) 0.3 1.85
4. In developing the vaccine of HIV, neither Alvac nor Aidsvax was found to be effective. Scientists are exploring whether using Alvac as a primer and Aidsvax as a booster will be effective for HIV. The Study is conducted in Thailand with 16,395 individuals from the general (not high-risk) popula- tion. • 74 HIV cases reported in the 8198 individuals receiving placebos. • 51 HIV cases reported in the 8197 individuals receiving the treatment. Let pı and p2 denote the...
5.3.65 Question Help Prominfestation, commonly found in children can be treated with a drug that is effective in 30% of cases Suppose that three chat given the drug complete parts through col below with purwo ndestation are A ach bral consists of observing whether the child is not cured of the pinworm infestation by the drug and has a possible outcomes, other not cured or Cred The results are independent. Supposing a c h at the chan cured the success...
A box in a certain supply room contains three 40-W lightbulbs, seven 60-W bulbs, and five 75-W bulbs. Suppose that three bulbs are randomly selected. (Round your answers to four decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 75-w2 079 (b) What is the probability that all three of the selected bulbs have the same rating? (c) What is the probability that one blb of each type is selected? d) Suppose now...
Most questions answered within 3 hours.
-
Find the expected count and the contribution to the chi-square
statistic for the (Group 1, No)...
asked 53 minutes ago -
Suppose you are purchasing a meal and with every meal a you
receive one of 10...
asked 44 minutes ago -
A 75.0 kg 0erson is riding in a car moving at 20.0 m/s when the
car...
asked 46 minutes ago -
What does Δp = QR mean in words?
Pushing a viscous fluid through a pipe requires...
asked 52 minutes ago -
We know that system.out.println (“object number” + n ); is
legal.String name; int n; name =...
asked 52 minutes ago -
Come up with a real-life problem (open-ended) and solve it by
designing and writing a Java...
asked 1 hour ago -
Power Music owns five music stores, where it sells music,
instruments, and supplies. In addition, it...
asked 1 hour ago -
True or false and
why:
Given the following sequence of numbers to be
inserted {4,5,6,1,2,3,8,7}, the...
asked 1 hour ago -
Code using Java
What is an interface? Complete the following code:
interface IExample{
public void print();...
asked 1 hour ago -
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to
estimate the mean...
asked 1 hour ago -
what are your opinions on environmental rights and absolute bans
?
asked 1 hour ago -
benzene melts at 5.5 degrees c if the vapor pressure of liquid
benzene is 19.2 kOa...
asked 1 hour ago