Known standard deviation
With n = 66 and sample mean of $3903 and known standard deviation of (sigma) = $801; Find and illustrate a 95% confidence interval for the population mean M.
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The plumber cuts the pipe in two pieces at the point selected at random. Find probability that length of longer piece of pipe is at least eight times the length of shorter piece of pipe?
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The breaking strengths of the random sample of 23 molded plastic housings were determined, and sample mean of x = 479.42 and a sample standard deviation of s = 12.55 were obtained. A confidence interval (472.56, 486.28) for average strength of mol
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Water flows from the drainspout with the initial velocity of -0.19670m/sec. Find range of values of distance, d for which water will enter the trough.
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