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Let an urn contain 5 balls, numbered 1 to 5. Let a sample of size 3 be drawn with replacement (without replacement) from the urn and let X be the largest number in the sample. Find the mean and variance of X.
What is the probability that a simple random sample of 40 male graduates will provide a sample mean within $10,000 of the population mean, $168,000 (to 4 decimals)?
When designing a study to determine this population proportion, what is the minimum number you would need to survey to be 90% confident that the population.
A company has two assembly lines, each of which stalls an average of 2.4 times per week according to a Poisson distribution.
Early Television Exposure and Subsequent Attentional Problems in Children," published in Pediatrics in April 2004, investigated television-watching habits
Using a 0.05 level of significance, test the claim that the training helps to improve the athletes' times for the 800 meters.
The mean age of adult learners in a chosen class of 31 students is 33.8 years. The standard deviation is equal to 7 years.
Consider again the Markov chains corresponding to the wheel of fortune. Prove or disprove that they are irreducible and aperiodic.
I have a lower spec limit of -0.008 and an uppers spec limit of 0.008. The mean of the data is -0.00306 and standard deviation is 0.003642. What is the z-score and DPMO
Compare the interval found in part (b) to the histogram of the data. Explain whether or not the interval is a reasonable description of the data.
A couple decides to keep having children until they have at least one boy and at least one girl, and then stop.
question a random sample of five accidents resulted in the following number of persons injured 18 1512 19 amp 21.
What sample size (randomly selected from all taxpayers residing in each of neighborhoods 1 and 2) is required to generate a 90% confidence interval.
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