Share
Explore BrainMass

Probability

Probability

From 5 statisticians and 6 economists, a committee consisting of 3 statisticians and 2 economists is to be formed. How many different committees can be formed if: (a) there are no restrictions (b) 2 particular statisticians must be on the committee (c) 1 particular economist cannot be on the committee Answers: (a) 150 (

Poisson distribution

2. Mistakes made by data entry clerks follows a Poisson distribution with a mean 0.8 per hour. You just gave someone applying for your data entry vacancy an hours worth of data entry material. Answer the following questions. A) What is the probability they will not make any mistakes? B) What is the probability they will

Statistics: Probability

The prizes that can be won in a sweepstakes are listed below with the chances of winning each one: $4000 (1 chance in 8200); $1700 (1 in 5300); $800 (1 in 4100); $200 (1 in 2200). Find expected value of the amount won for one entry if the cost to enter is 55 cents. Answer is 0.54. Please explain the procedure (without only showi

Statistical genetics

You are reviewing a scientific study where the epidemiologists sampled 1000 people from Charleston, South Carolina and measured variation at two loci, A and B. The haplotype frequencies in the sample population are: AB = 0.406 Ab = 0.214 aB = 0.214 ab = 0.166 Toward the end of the article you are reviewing, you read th

Statistics

It has been determined empiracally that for a certain egg producer, the number of cracked or broken eggs X, in a randomly slected box containing six eggs, follows approximately the distribution given in the table below: X: 0 1 2 3 4 5 6 P(X): 0.9 0.07 0.02 0.005 0.003 0.001 0.001

Probability: Color Smart Television Sets

The manufacturer of the ColorSmart-5000 television set claims that 95 percent of its sets last at least five years without needing a single repair. In order to test this claim, a consumer group randomly selects 400 consumers who have owned a ColorSmart-5000 television set for five years. Of these 400 consumers, 316 say that thei

Mathematics for Computing

I have completed these but have no solutions with workings out Use the binomial distribution to calculte the pobability of........Calculate the probability that the lifetime of a paticular device is........Investigate the degree of correlation between the results....Use a regression technique to estimate the job performance..

GAUSSIAN DISTRIBUTION AND PROBABILITY

A RANDOM VOLTAGE x(t) HAS A GAUSSIAN DISTRIBUTION WITH A MEAN VALUE OF 0 V AND A STANDARD DEVIATION OF 10V. A SINGLE RANDOM SAMPLE X IS TAKEN. DETERMINE THE FOLLOWING PROBABILITIES:(a) P(X >= 0 V), (b) P(X >= 10 V), (c) P(X <= -10), (d) P(-10 V <= X <= 10 V), (e) P(absolute value of /X/ >= 10 V), (f) P(X >= 20 V), and (g) P(ab

Pdf plotting

A.)THE FORCE x(t) ASSOCIATED WITH A CERTAIN RANDOM PROCESS IS UNIFORMLY DISTRIBUTED BETWEEN THE LEVELS OF -2 N AND 6 N. PLOT THE PDF AND DETERMINE ITS LEVEL. B.)FOR THE RANDOM FORCE ABOVE, ASSUME THAT A RANDOM SAMPLE X IS TO BE TAKEN. DETERMINE THE FOLLOWING PROBABILITIES: (a) P(X = 0 N),(b) P(1.95 N <= X ,= 2.05 N),(c) P(X

PROBABILITY

A.)AN UNBIASED COIN IS FLIPPED 5 TIMES. WHAT IS THE PROBABILITY OF GETTING EXACTLY 1 HEAD ON THE 5 TRIALS? B.)WHAT IS THE PROBABILITY OF GETTING AT LEAST ONE HEAD IN THE 5 TRIALS?

Pretest

Question 1 (5 points) Chose a simple random sample of size five (5) from the following employees of a small company. 1. Bechhofer 4. Kesten 7. Taylor 2. Brown 5. Kiefer 8. Wald 3. Ito 6. Spitzer 9. Weiss Use the numerical labels attached to the names above and the following list of random digits. Read the

Analysis and Decision Tree

Techware Incorporated is considering the introduction of two new software products to the market. In particular, the company has four options regarding these two proposed products: introduce neither product, introduce product 1 only, introduce product 2 only, or introduce both products. Research and development costs for prod

Statistics

Suppose you roll a die. If you roll an odd number, you win the dollar amount corresponding to the number of dots showing. If you roll an even number, you lose the number of dollars corresponding to the number of dots. (For example, if you roll a three you win $3. If you roll a six, you lose $6.) You pay $.50 (fifty cents) t

Binomial Distribution

1.If you are dealt 3 cards from a shuffled deck of 52 cards, find the probability that all 3 cards are queens. 2. A fair coin is tossed 8 times in succession. Find the probability of getting at least 4 heads. 3. A die is rolled twice. Find the probability of getting two numbers whose sum exceeds 5. 4.How many different five-l

P value

20% cars are green; 10 pass by; what is P that 4 are green? Please also provide formula and graph.

Probability

Problem: Complete probability and find the mean and standard dev. x=250 P(x) = .40 x= 100 P(x) = .10 x= 250 P(x) = .20 x=400

Mean

Problem: Scores for SAT normally distributed with mean of 531 and standard dev. of 114. If college includes minimum score of 600 among requirements, what % do NOT satisfy requirement? Also, graph.

Probability Distribution Function

Suppose that the random variable y is described by the following probability distribution function: f(y) = 2/9y for 0<or=y<or=3 and it is 0 elsewhere. a.) Find P(0.50<or=y<or=1.50) b.) Find the mean and variance of y.

Probability

A study of vehicle flow characteristics on acceleration lanes found that one out of every six vehicles uses less than 1/3 of the acceleration lane before merging into the traffic. Suppose we monitor the location of the merge for the next 5 cars that enter the acceleration lane. a.)What is the probability that none of the veh

Probability

A committee has 6 grad students (4 are men), 8 undergrads (5 are men) and 3 faculty members (1 is a man). If 1 member is selected randomly, what is the P of getting a grad student or a man?

Independent

Scott gets a hit in 32% of the hits at bat. He bats 4 times in a game (assume each at bat is independent of the others). a) What is the chance he gets a hit in all 4 at bats? b)What is the chance he gets at least 1 hit?

Probability questions

a)Probablity an event is likely to occur? b) P of an impossible event? c) Sample space consists of 25 separate events equally likely. What is P of each? d) True/False test. P of correct if a random guess? e)Multiple choice test with 5 possible answers for each, P of getting correcdt of random guess?

Statistics problems

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

Probability

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