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Suppose that when certain geological conditions exist, there is a 20% chance of striking oil. A drilling company finds five independent locations where these geological conditions exist and drills one well at each location. If five wells are drilled, what is the probability that at least one of them will strike oil?
a researcher wishes to estimate the proportion of adults who have high speed internet access. what size sample should
Two cards are drawn successively and without replacement from an ordinary deck of playing cards. Compute the probability of drawing-- A heart on the first draw, a club on the second draw.
A state meat inspector in lowa has been given the assignment of estimating the mean net weight of packages of ground chuck labeled " 3 pounds." Of course, he realizes that the weights cannot be precisely 3 pounds.
If there are repeated independent trials and there are only two outcomes, what distribution should be used?
two distinct solid fuel propellants type a and type b are being considered for a space program activity. burning rates
A researcher wants to see whether the stress of final exams elevates the blood pressure of freshman women. When they are not under any unusual stress, healthy 18 year olds have a systolic blood pressure that averages mean of 120 mm Hg with a stand..
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
Given the following raw scores, calculate the following values: Range, Variance and Standard Deviation, show your calculations: Scores: 9, 7, 8, 4, 8, 8,7, 8, 9, 6, 3
construct a 96 confidence interval for the true mean breaking strength of a certain type of 10 ft. long cables. assume
it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that
Find the probability that a value randomly selected from this population will have a value between 90 and 130.
find the 95 confidence interval for estimating ?d based on these paired data and assuming normality. give your answers
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