Find probability of two numbers same if rolling three dices
What is the probability of having the same number when rolling two dices? What is the probability of having at least 2 numbers the same when rolling three dices? What is the probability of having at least 2 numbers the same when rolling four dices?
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Calculate the confidence interval for the proportion of respondents who stated they are former smokers.
We have a carton of 12 rechargeable batteries contains two that are defective. In how many ways can the inspector choose 3 of the batteries and get
A sample of n 4 scores has a mean of M 12. A second sample of n 6 scores has a mean of M 8. If the two samples are combined, what value will be obtained for the mean of the combined sample?
A sample of n 8 scores has a mean of M 12. One new score is added to the sample and the new mean is found to be M 13. What is the value of the new score?
What is the probability of having the same number when rolling two dices? What is the probability of having at least 2 numbers the same when rolling three dices?
He randomly samples 18 BMW drivers and finds out that the average annual salary for this sample is $78 974, with a population standard deviation of $7810. Use α = .01 to test the researcher's theory. Assume annual salaries are normally distr
Suppose a researcher believes that the average annual earnings of a BMW driver are lower now, and he sets up a study in an attempt to prove his theory.
If a group of 4 were randomly selected from a group of 6 people (3 female;3 males) what is the probability the selected group will consist of 1 male and 3 females?
In a city of 120,000 people there are 20,000 norwegians. What is the probability that a randomly selected person will be norwegian?
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