Probability of recovery = 0.80
Required probability = 10c7 (0.80)7(1-0.80)10-7
= 0.20
(2) Find the probability that exactly 7 out of 10 people will recover from a tropical...
The probability that a certain kind of component will survive a shock test is .8. 1. Find the probability that exactly 2 of the next 6 components you test will survive. 2. What is the probability that you must test 8 components to find two that fail? 3. What is the probability that the 4th component you test is the first one that fails the test? 4. Out of a group of 100 components, 20 would fail a shock test....
Fifty percent of the people that get mail-order catalogs order something. Find the probability that exactly two of 10 people getting these catalogs will order something.
Using Probabilities for Significant Events. a. Find the probability of getting exactly 7 girls in 8 births. b. Find the probability of getting 7 or more girls in 8 births. c. Which probability is relevant for determining whether 7 is a significantly high number of girls in 10 births: the result from part (a) or part (b)
Problem 5: The probability that a patient fully recovers from a severe back pain after a certain type of therapy is 0.85. Suppose 20 people are known to have severe back pain were subjected this type of therapy. (1) Find the probability that exactly 15 fully recover? (2) Find the probability that at least 9 recover? (3) Find the probability that at least 14 but not more than 18 recover? (4) Find the probability that at most 15 recover? (5)...
Leave blank 7. A drugs company claims that 75% of patients suffering from depression recover when treated with a new drug. A random sample of 10 patients with depression is taken from a doctor's records (a) Write down a suitable distribution to model the number ofpatients in this sample who recover when treated with the new drug. Given that the claim is correct, (b) find the probability that the treatment will be successful for exactly 6 patients. The doctor believes...
1.) Determine the probability that in a group of 3 people, none of them die from heart disease or cancer 2.) Determine the probability that in a group of 3 people, at least one of them die from heart disease or cancer, and explain why it is so difficult to calculate this probability directly yet so easy to calculate it using a trick. Odds of dying from Heart disease AND cancer are 1 in 7
Dirk is taking a survey of 7 people who walk out of Starbucks during lunch. Based on the national average, 72% of people prefer coffee over tea; 28% of people prefer tea over coffee. 1. What is the probability that of the 7 people surveyed, exactly three of them prefer coffee? Preview 2. What is the probability that no more than 2 of the people prefer coffee? Preview 3. What is the probability that at least 3 of the people...
1. The birthday of six random people has been checked. Find the probability that (a) At least one of them is born in September. (b) All five are born in the Spring. Spring here means one of the month March, April, or May. (c) At least two of them are born in the same month. In this problem you can assume that a year is 365 days. 2.A fair die is rolled three times. We say that a match has...
Only 5 out of 1000 people get sick from a specific disease. A test for the disease is 99% accurate. This test also has a 2% false positive result (2% of the people that test positive are actually not sick with the disease). What is the probability that if you receive a positive test result, that you actually have the disease?
Researchers carry out a medical study with a random sample of 10 patients. The patients are prescribed a medicinal drug that causes side effects with probability 0.04. Find the probability that exactly one patient in the study shows side effects. Note: Assume statistical independence and define appropriate random variables and their distributions. Please use Cumulative Areas of the Standard Normal Distribution if u need