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Two types of engine bearings were fabricated out of different compounds and tested in an experimental engine to measure how long it takes until they fail. The 35 Type I bearings lasted an average of 1.574 million engine cycles with an estimated standard deviation of 0.34 million cycles. In the other group, 40 Type II bearings lasted an average of 1.796 million engine cycles with an estimated standard deviation 0.57 million cycles. Assuming that these times are independent and normally distributed, test whether there is a significant difference between the average breakdown times. Use a significance level of α = 0.05.
jhon, mary,and ali have 17,12 and 10 marbels respectively what is the everage of marbels each of them have?
what are radical expressions? What is the process we follow when adding, subtracting, multiplying, and dividing radical expressions? In your answer, demonstrate the process for each one with your own example.
How much farther must the person walk to be completely out of the silo's shadow? (Round your answer to 2 decimal places.)
Let p be a prime, let K be a number not divisible by p, and let b be a number that has a kth root modulo p. Find a formula for the number of kth roots of b modulo p and prove that your formula is correct. (hint. your formula should only depend on ..
find the domain of the function and express the answer in interval notation. explain in words or show the
ms. fitness-buff a high school gym teacher wants to propose an after-school fitness program. to get an idea of the
using the given data and chart find the coefficients a b and cnbsp of the exponential model algebraically.above is a
Specify an appropriate boundary condition at x = 0 to ensure that the problem is self-adjoint. b) Use the Rayleigh quotient to show that there are no negative eigenvalues.
last weeks sales of imac computers at an apple store in oklahoma city okare shown in the following tabledaysales
A gardner plans to use 196 feet of fencing to enclose a garden. What is the largest possible area of the garden?
sketch the curves given by the following parametric equations find corresponding cartesian equations if possible.a in
application of calculus-optimization problemtwo vertical poles pq and st are secured by a rope prs going from the top
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