Please use Excel when necessary: Acording to a recent survey, 70% of all customers will return to the same grocery store. Suppose 10 customers are selected at random, What is the probability: a) Exactly 5 of the customers will return? b) All 10 customers will return? c) At least 7 of the customers will return? d) Less th
Access time to a supercomputer mainframe is normally distributed with an average(mean) of 92 minutes a day with standard deviation of 11 minutes.
Please use Excel when necessary: Access time to a supercomputer mainframe is normally distributed with an average(mean) of 92 minutes a day with standard deviation of 11 minutes. Find the probability that on a certain day, the access time is: a) Less than 60 minutes b) More than 100 minutes c) Between 70 and 90 minutes
1, At Acme Inc., women employees are three times as likely to take advantage of computer training courses as men employees. Seventy percent of Acme's very large work force are women. a, What proportion of Acme employees who take advantage of computer training courses are women? b, Twelve percent of the workforce at Acme ta
The cell phone industry is growing at a rapid pace. Current estimates suggest that 60% of people have cell phones.
The cell phone industry is growing at a rapid pace. Current estimates suggest that 60% of people have cell phones. Suppose 25 people were randomly and independently sampled. Let X be the number of people in the sample having cell phones. A) The variable X follows: aa) Normal distribution. bb) Continuous distribution. cc) Binomia
For a randomly selected student in a particular high school, let Y denote the number of living grandparents of the student.
For a randomly selected student in a particular high school, let Y denote the number of living grandparents of the student. What are the possible values of the random variable Y? (Points: 15) 1,2,3,4 4 0,1,2,3,4 0,1,2 2. When two balanced dice are rolled, 36 equally likely outcomes are
This solution shows how to find probabilities of events from a known normal probability distribution.
The length of time it takes to find a parking spot at the mall follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. A) What is the probability that it takes more than 4 minutes to find a parking spot. B) what percent of individuals will take less than 3 minutes to find a parking s
Gas Station pump signs, at one chain, encourage customers to have their oil checked, claiming that one out of every four cars should have its oil topped. a.) What is the probability that exactly 3 of the next 10 cars entering a station should have their oil topped? b.) What is the probabily that at least half of the next
If the probability that an individual suffers a bad reaction from injection of a given serum is 0.001, determine the probability that out of 2000 individuals; a.) Exactly 3 b.) More than 2 individuals will suffer a bad reaction.
Insurance probability tables, as the one on the attachment, tabulates the average # of American males per 100,000 who will die during various age intervals. E.G., out of 100,000 male babies born alive, 1,527 will die before their first birthday. Answer following w/ table: a.) What is the probability that a newborn male will
4 different math books, 2 different Chemistry books, and 6 different physics books are arranged on a shelf. How many different arrangements are possible if: a.)The books in each particular subject must stand together? b.)Only the math books must stand together?
Only above listed OTA Replacement time for tv sets normally distributed with a mean of 8.2 years and a stan. dev. of 1.1 years. a) Find probability that a randomly selected set will have a replacement time less than 5.0 years b) If you want to provide a warranty so that only 1% of the sets will be replaced before the warranty
1. The manager of a toy store has to decide how many toys to stock for the Christmas season. Each toy cost the store $5 and is sold for $10. The manager is certain that total sales of a particular toy will always be either 1,000 units, 2,000 units, 3000, 4000, or 6,000 units. The manager has to decide whether to order 2,000, 4,0
1.) A recent survey by the American Accounting Association revealed 23 percent of students graduating with a major in accounting select public accounting. Suppose we select a sample of 15 recent graduates. a. What is the probability two select public accounting? b. What is the probability five select public accounting? c. H
A group of 30 people gather in a room. What is the probability that at least 2 of these people have the same birthday? The year of birth is not considered; having the same birthday means two peple were born on the same day of the year.
1. In a recent poll of married couples, about 79 percent of the men and 55 percent of the women were employed outside the home. In 39 percent of the couples, both the husband and the wife work outside the home. Find the probability that in a randomly selected couple either the husband or his wife works outside the home.
Construct a table giving the binomial distribution for each of the following: a) The probability of guessing correctly on a 10-question true-false test. b) The probability of guessing correctly on a 20- question multiple choice test, with 4 alternatives per question. c) For a 100-question true-false test, the normal approx
Please see the attached file for the fully formatted problem. f(y) = cy^2(1-y)^4 0<y<1 f(y) = 0, elsewhere Find the value of C that makes f(y) a probability density function, then find E(Y)
1. A True-False test was developed for a Risk Management class. A student, who didn't study, decided to randomly guess the answer on each question. Assume that the probability that the student guess correctly on each question is 50%. The exam has 20 questions. A correct answer adds 1 to the test score, an incorrect answer adds 0
Let X be a random variable with uniform distribution over the interval (0,1) and let Y = X^2 (X squared). Find the probability density function of Y.
Assume that 12 percent of adults in this country have filed for bankruptcy at some point in their life. If an independent sample of 20 adults is selected find the probability that fewer than 5 will have filed for bankruptcy at some point in their life.
A rugby team of 13 consists of five backs, six forwards and two halves. (a) How many teams are possible from a squad of 17, consisting of six backs, eight forwards and three halves? (b) How many teams are possible from a squad of 17, consisting of six backs, eight forwards and two halves, and one player who could play as a
Eagle airlines' planes hold only 15 people. Past records indicate that 20% of the people making a reservation do not show up. We will assume that all reservations are independent; that is each reservation is for one person and these reservations are made independent of one another. Suppose that Eagle Air decides to book 18 peopl
Currently, an average of 7 residents of the viallage of Westport (population760) die each year (based on data from the U.S. National center for Health Stastics) a.find the mean of deaths per day b. find the probability that on a given day, there are no deaths c.find the probability that on a given day, there is one death d.
Please see the attached file for full problem description. Ex 29 According to Census Bureau, deaths in the United States occur at a rate of 2,425,000 per year. The National Center for Health Statistics reported that the three leading causes of death during 1997 were heart disease (725,790), cancer (537,390), and stroke (159
This problem shows how to calculate probabilities and percentiles from normal and binomial probability distributions.
A company that sells annutities must base the annual payout on the probability distribution of the length of life of the participants in the plan. Suppose the probability distribution of the lifetimes of the participants is approximately a normal distribution with a mean of 68 years and a standard deviation of 3.5 years. Find th
A box contains glass lenses used for traffic signals. Six are red, four are yellow, and seven are green. If two are chosen at random find the probability they are both green, if: a. the first lense is replaced before the second is chosen b. the first lense is not replaced before the second is chosen.
A. If two events are dependent, then P(A/B) will equal _______________. b. If two events are independent, then P(A and B) will equal _______________. c. The rule for complementary events is useful for finding P(_______________). d. If two events are not mutually exclusive, P(neither A nor B) will equal
I got confussed with this one. So if you can help me out. Thank You Busy Tellers. Prescott National Bank has six tellers available to serve customers. The number of tellers busy with customers at, say, 1:00 P.M. varies from daya to day and depends on chance, so it is a random variable, say, X. Past records indicate that the p
On the Titanic, the passenger roster showed that there were 1692 men, 422 women, 64 boys, and 45 girls. Only 332 men and 29 boys survived. 104 women and 18 girls died. Answer in reduced fraction form. A. What is the probability of selecting a person from the roster who was a man who survived? B. What is the probability of s