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An oil co. is drilling some wells. the results are described as either a dry well or a producer well. Past experience suggests that 10% of exploratory wells are producer wells. If the company drills 12 wells, what is the probability that all 12 wells are producer wells?
What is the probability that all 12 wells are dry wells?
What is the probability distribution for the number of dry wells?
If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10
Create a 90% confidence interval for proportion of all kernels that would not pop.
Compute the variance and standard deviation of the number that will arrive within two days.
An investment counselor would like to meet with 12 of his clients on Monday, but he has time for only 8 appointments. How many different combinations of the clients could be considered for inclusion into his limited schedule for that day?
Recognize and describe potential threats (up to 3) to internal validity.
One normal curve has mean 23 and standard deviation 1, a second normal curve has mean 5 and standard deviation 10. The curve that is more dispersed, or spread out, is
LSAT scores are normally distributed, with a mean of 150 and s = 10.
What fraction of the calls last between 4.2 and 5 minutes?
The standard deviation of the time to complete the entire homework assignment
Scores on a test are normally distributed with a mean of 60.9 and a standard deviation of 12. Find P81, which separates the bottom 81% from the top 19%.
If an applicant is randomly selected, find the probability of a rating that is between 200 and 275.
Illustrate for what value does probability XYZ will offer a competing product will ABC be indifferent among the alternatives.
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