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What is the Probability that the selected screw came from Lot 1? What is the Probability that the selected screw was defective? If the screw was defective what is the probability that it came from Lot
In a certain very large city, the Department of Transportation (D.O.T.) has organized a complex system of bus transportation. In an advertising campaign, citizens are encouraged to use the new "GO-D
Suppose that 1% of a large population carries antibodies to HIV in its blood. Draw a tree diagram with this information and use it to answer the following question.
Find x1 such that P(X>x1) = 0.6. Consider an interval for X, (a<X<b). Calculate a and b such that the interval is shortest and P(a<X<b) = 0.3
Using Minitab, generate a set of n observations from a binomial distribution with 1 trial and an event probability of 0.002, where n is your answer from
If the test says that pollutants are not present in a particular sample, what is the probability that is fact there are pollutant in the sample in question?
let X be random variable with the following probability distribution
Estimate the mean and standard deviation of the time-to-failure for Network A, the time-to-failure for Network B, and the difference between the time-to-failure for the two networks. Can you be at
P(X > 1.2)(Give decimal answer to two places past decimal.) Find the median time the book is checked out. (Give decimal answer to two places past the decimal.)
You are considering four independent variables for inclusion in a regression model. You select a sample of 30 observations, with the follwings results:
Suppose probability samples of size n=2 are selected from {1, 2, 3, 4} with probabilities d1=.4, d2=.4, d3=.1, and d4=.1. Demonstrate that tau_hat is still an unbiased estimator of the population t
You are asked to determine whether or not brunette students have a higher IQ score than other students. To do so, you administer an IQ test to a random sample of 300 brunette students. It is known t
Each of four persons, named 1, 2, 3, 4 fires one shot at a target. Let Ak denote the event that person k hits the target, where k = 1, 2, 3, 4. Assume A1, A2, A3, A4 are independent events. If P(A1)
A poker-hand called "three of a kind" has 3 cards of one denomination and 2 other cards neither of which is of that denomination. What is its probability?
In a series of 40 payments the first 10 payments are 10 each, the second 10 payments are 20 each, the third 10 payments are 30 each, and the final 10 payments are 40 each. The payments are equally
Can someone please help me with finding these critical t scores. What is the positive critical t score for a two-tailed test with an alpha of .10 an an N of 31?
Can someone please help me with finding these critical z scores. What is z (critical) for a positive one-tailed test with an alpha of .05?
What is a 99% confidence interval on our estimate of mean if our sample of 40 observations (with a sample standard deviation of 0.9) produces a sample mean of 161.8?
A simple random sample without replacement of 30 households was drawn from a city area containing 14; 848 households. The number of persons per household in the sample were as follows:
The population of IQ scores forms a normal distribution with a mean of µ = 100 and a standard deviation of o = 15.what is the probability of obtaining a sample mean greater than M=97
Select a company (maybe your employer) and assess how it uses data in marketing its products or services. (If it is not your employer, find a sizable local company or search the Internet for a compa
Suppose that a player is a 75% shooter in the first throw and a 80% shooter in the second if the first one is scored, but a 50% shooter in the second if the first one is missed. What is his averag
If a basketball player is a 60% free throw shooter, then on average how many free throws will he make in a game with six free throw attempts?
One hundred items are simultaneously put on a life test. Suppose the life-times of the individual items are independent exponential random variables wih mean 200 hours. The test will end when there
A fair ten-sided die is rolled once. Event A is the event that a number less than 7 is rolled. Event B is the event that a number beginning with the letter "s" is rolled. Then the probability of eve