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The engineer in Problem 6 was having a busy day, so instead of testing 20 lenses per hour he simply tested lenses until a defective lens was found.
(a) What is the probability that the engineer tested fewer than four lenses?
(b) What is the expected number of lenses that the engineer would test using this procedure?
(c) Write up a proposal for a quality inspection plan based on testing until a defective is found. Include both a warning and a critical (i.e., stop production) limit for the inspection team. Hint: Base your limits on the minimal number of defect-free lenses that an inspector must find at each inspection. You may want to use a spreadsheet (or other such tool) to calculate a series of probabilities to help you in defining limits.
If the doctor wants to use height to predict head circumference run a linear regression on the data. Find the r-value and comment about it.
The amount of time the university professors devote to their jobs per week is normally distributed with a mean of 52 hours and a standard deviation of 6 hours.
1.suppose we toss a penny and a nickel. let a be the event that the penny is a head and b be the event that the nickel
Develop a 90 percent confidence interval for the proportion opposing health care changes. (Round your answers to 4 decimal places.)
CD Camera produces a new camera that it claims can take an average of more than 7 photographs per second. A test of 36 randomly selected cameras yielded the following sample values:
1. Show that the set R\Q of irrational numbers, with usual topology (relative topology from R), is topologically complete. 2. Define a complete metric for R\{0, 1} with usual (relative) topology.
A start-up publishing company estimates that the fixed costs of its first major project will be $190,000, the variable cost will be $18, and the selling price per book will be $34.
the public library has a board of directors consisting of 6 women and 4 men. a 3-member committee from the board is to
200 draws are made with replacement from a box of numbered tickets these tickets are labeled either -2 or 3. is it
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a large chain retailer purchases a certain kind of electronic device from a manufacturer. the manufacturer indicates
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