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KM

Kiki M.

Probability

an hour ago

Suppose a jar contains 12 red marbles and 22 blue marbles. If you reach in the jar and pull out 2 marbles at random, find the probability that both are red.

ED

Elci D.

Probability

3 hours ago

Leo has a pizza business. The times to prepare and deliver pizzas are approximately normally distributed with average time of 27 min and standard deviation SD of 5 min. a) Suppose that Leo "if takes ,ore than 35 min to get your pizza, you get it free". What fraction of his take-out pizzas will he have to give away free? b) How long a time should Leo allow if he wants to give away no more than 10% of the pizzas?

ED

Elci D.

Probability

4 hours ago

Leo has a pizza business. The times to prepare and deliver pizzas are approximately normally distributed with average time of 27 min and standard deviation of 5 min. a0 suppose that Leo advertises if takes more than 35 min to get your pizza, you get it free. what fraction of his take-out pixxas will he have to give away free?

KJ

Kwame J.

Probability

8 hours ago

The duration of Alzheimer’s disease from onset of symptoms till death ranges from 3 to 20 years. The average is 9 years with a standard deviation of 4 years. The records of 50 diseased patients are chosen at random. Find the approximate probabilities that the average duration lies within 1 year of the population mean.

KJ

Kwame J.

Probability

8 hours ago

3. (15 pts) A company is introducing new software, and wishes to train its employees in its use. In order to determine the best training method a number of employees will be divided into 2 groups,

KJ

Kwame J.

Probability

8 hours ago

A telephone company representative estimates that 45% of its customers want call-waiting service. To test this hypothesis, she selected a sample of 100 customers and found that 39% had call-waiting. Is her estimate appropriate? (You are required to specify H0 and Ha, give a test statistic, find the p-value for the test, and draw your conclusion.)

ED

Elci D.

Probability

9 hours ago

2. 80% of households in the United States own a computer: You randomly select eight households and ask each if they own a computer: a) What is the chance that five of the households own computer (use binomial formula) b) What is the chance that all of the households own a computer? What is the chance that at least one of the households own a computer?

JD

Joe D.

Probability

1 day, 4 hours ago

Suppose P is drawn from the Uniform[0,1] distribution, and then conditional on P, another random variable X is drawn from a Bernoulli(P) distribution. (a) Use the tower law to compute P(P ?t,X = 1) where t ?[0,1] is some constant value. (b) Compute the CDF of the conditional distribution of P given X = 1. (c) Now suppose that, after P is drawn, we instead draw twice from the Bernoulli(P) distribution to produce random variables X and Y , rather than drawing only once to produce X as before. (We assume that, conditional on the value of P, the random variables X and Y are drawn independently.) Calculate P(X 6= Y ).

BM

Brian M.

Probability

1 day, 4 hours ago

probability of drawing a fiction book first and then a hardcover book second when drawing without replacement.

BM

Brian M.

Probability

1 day, 4 hours ago

probability of drawing a fiction book first and then a hardcover book second when drawing without replacement.

Dd

Dolor D.

Probability

None

NS

Nishant S.

Probability

1 day, 6 hours ago

Let ???? = {????1, … , ???????? } be an identically, independent distributed (iid) sample drawn from a Rayleigh distribution with an unknown scaling parameter ????, defined as follows:

MS

Maxwell S.

Probability

1 day, 12 hours ago

A particular system in a space vehicle has 5 components labelled A, B, C, D and E. Each component of the system operates independently of any other and the probabilities of the components working are 0.6, 0.7, 0.8, 0.7 and 0.9, respectively. The system will be classified as in a functional state if at least four components are working. What is the probability that the system will be classified as malfunctioning

DB

Deborah B.

Probability

1 day, 13 hours ago

1. The first three digits of a university telephone exchange are 452. If all the sequences of the remaining four digits are equally likely, what is the probability that a randomly selected university phone number contains seven distinct digits? 2. How many different meals can be made from four kinds of meat, six vegetables, and three starches if a meal consists of one selection from each group?

SH

Sonya H.

Probability

1 day, 16 hours ago

Let X1 and X2 be independent and identical normal random variables with common mean 3 and standard deviation 1. Consider the sample mean U = X1+X2 . a. What is the moment-generating function mU(t) of U? b. What is the distribution of U ?[Hint: Refer to Proposition 3.1, mu(t) = mx1(1/n t) mx2(1/n t). ] c. Find the probability that the observed sample mean is between 2.8 and 3.2.

DG

Delani G.

Probability

1 day, 16 hours ago

Suppose 25% of people who eat are Taco Bob’s are satisfied with their meal. You decide to conduct an SRS of 20 people. Assume a binomial distribution is valid (2 points each). a) What is the probability that exactly two people are satisfied with Taco Bob’s? b) What is the probability that no more than 13 people are satisfied with Taco Bob’s? c) What is the probability that exactly 3 people are NOT satisfied with Taco Bob’s? d) What is the expected number of people that are satisfied with Taco Bob’s?

SA

Sajid A.

Probability

1 day, 18 hours ago

A coin and die are tossed

FE

Fahmidha E.

Probability

None

IR

Ian Mar R.

Probability

2 days, 1 hour ago

3. Let X denote the diameter of an armored electric cable and Y denote the diameter of the ceramic mold that makes the cable. Both X and Y are scaled so that they range between 0 and 1. Suppose that X and Y have the joint density Find (a) P(X + Y > 1/2). (b) the marginal distribution of X; (c) the marginal distribution of Y

JG

J G.

Probability

2 days, 4 hours ago

In 50 of the 80 years from 1927 through 2006 a certain stock market finished higher after the first week of trading. In 44 of those 50 ?years, this market finished higher for the year. The following table gives the? first-week and annual performance of the market over this 80?-year period. Use the table to answer? (a) through? (c) below.

JG

J G.

Probability

2 days, 4 hours ago

In of the years from through a certain stock market finished higher after the first week of trading. In of those ?years, this market finished higher for the year. The following table gives the? first-week and annual performance of the market over this ?-year period. Use the table to answer? (a) through? (c) below.

JS

Josephin S.

Probability

2 days, 7 hours ago

The average American man consumes 9.6 grams of sodium each day. Suppose that the sodium consumption of American men is normally distributed with a standard deviation of 1 grams. Suppose an American man is randomly chosen. Let X = the amount of sodium consumed. Round all numeric answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N( , ) b. Find the probability that this American man consumes between 9.1 and 10.7 grams of sodium per day. c. The middle 30% of American men consume between what two weights of sodium? Low: High:

JS

Josephin S.

Probability

2 days, 7 hours ago

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0¬įC and a standard deviation of 1.00¬įC. A single thermometer is randomly selected and tested. Let Z represent the reading of this thermometer at freezing. What reading separates the highest 44.75% from the rest? That is, if P ( z > c ) = 0.4475 , find c. c = ¬įC

JS

Josephin S.

Probability

2 days, 7 hours ago

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). The mean maximum oxygen uptake for elite athletes has been found to be 67 with a standard deviation of 8.1. Assume that the distribution is approximately normal. Find the probability that an elite athlete has a maximum oxygen uptake of at least 85.6 ml/kg. Find the probability that an elite athlete has a maximum oxygen uptake of at most 49.2 ml/kg.

RH

Rayan H.

Probability

None

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