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Suppose that the standard deviation of the tube life for a particular brand of TV picture tube is known to be s = 500, but that the mean operating life is not known. Overall, the operating life of the tubes is assumed to be approximately normally distributed. For a sample of n = 15, the mean operating life is X = 8,900 hr. Determine (a) the 95 percent and (b) the 90 percent confidence intervals for estimating the population mean.
To two decimal places, what is the value of the positive root in the auxiliary equation?
The parabolic coordinate system (a, b) can be defined as x = ab, y = a2 - b2/2. Determine the radial distance r = √(x2 + y2) in terms of a and b
The height is 4 feet longer than the length of a shelf. If 20 feet of lumber is abailable for the entire unit, except the back, find the length and height of the unit.
a pet cemetary sells plots for 3000 plus an amount calculated to provide for the cost of maintaining the grounds in
A tree stands on a hillside of slope 28 degrees from the horizontal. From a point 75 feet down the hill, the angle of elevation to the top of the tree is 45 degrees. Find the height of the tree.
question a cylinder has a lateral surface area of 9p4in2 nine pi over 4inches squared.its radius is multiplied by a
Use the integration capabilities of you graphing utility to approximate the arc length of the space curve given by: vector r(t) = t i + t^3 j + 3t K from the point (1,1,3) to the point (2,8,6). Round your answer to the nearest three decimal places..
Two minor league baseball players got a total of 336 hits. Washington had 6 more hits than Sanchez. find the number of hits for each player.
Example of a Random Procedure with Specified Events. Please list as many different groups of complete events as possible for an experiment of your choice (Probability). Need real world example on complete events
How draw a infinite long cylinder perpendicular to xy-plane by Mathematica ? I do not know how to express the range of z in the code.
suppose that you save for retirement by contributing the same amount each month from your 25th birthday until your 65th
Can you prove that limx→1 x = 1 using the ε, δ definition of a limit? Find the domain of the function √x + log(3 - x). Find a formula for the inverse of the function f(x) = 23^x. What is the domain of f-1
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