Each of 169 newly manufactured items is examined and the number of scratches per item is...
Each of 169 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of scratches per item 0 1 2 3 4 5 6 7 Observed frequency 24 31 48 31 14 12 4 5 Let X = the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter ?.
(a) Find an unbiased estimator of ? and compute the estimate for the data. [Hint: E(X) = ? for X Poisson, so E(X) = ?] (Round your answer to two decimal places.)
(b) What is the standard deviation (standard error) of your estimator? Compute the estimated standard error. [Hint: ?X2 = ? for X Poisson.] (Round your answer to three decimal places.)
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Each of 169 newly manufactured items is examined and the number
of scratches per item is...
Each of 161 newly manufactured items is examined and the number of scratches per item is...
Each of 161 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of scratches per item Observed frequency 12 44 35 33 12 12 8 5 0 123 4 5 6 7 Let X the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter μ (a) Find an unbiased estimator of μ...
Each of 166 newly manufactured items is examined and the number of scratches per item is...
Each of 166 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of scratches per item 0 1 2 3 4 5 6 7 Observed frequency 16 36 42 37 19 9 5 2 Let X = the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter μ. (a) Find an unbiased...
Each of 157 newly manufactured items is examined and the number of scratches per item is...
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Each of 163 newly manufactured items is examined and the number of scratches per item is...
Each of 163 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of 0 1 23 4 56 7 per item Observed frequency 19 37 3729 20 13 5 3 Let X-the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter μ. a Find an unbiased estimator of μ and compute the...
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Item X is a standard item stocked in a company's inventory of component parts. Each year...
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Item X is a standard item stocked in a company's inventory of component parts. Each year...
Item X is a standard item stocked in a company's inventory of component parts. Each year the firm, on a random basis, uses about 3,000 of item X, which costs $25 each. Storage costs, which include insurance and cost of capital, amount to $10 per unit of average inventory. Every time an order is placed for more of item X, it costs $6. a. Whenever item X is ordered, what should the order size be? (Round your answer to the...
30 The manager of the local Walmart Superright is studying the number of items purchased by...
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Each of 161 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of scratches per item Observed frequency 12 44 35 33 12 12 8 5 0 123 4 5 6 7 Let X the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter μ (a) Find an unbiased estimator of μ...
Each of 157 newly manufactured items is examined and the number of scratches per item is recorded the items are supposed to be free of scratches), yielding the following data: Number of scratches per item 0 1 2 3 4 5 6 7 Observed frequency 16 38 35 37 17 7 6 1 Let X = the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter u. (a) Find an unbiased...
Each of 163 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of 0 1 23 4 56 7 per item Observed frequency 19 37 3729 20 13 5 3 Let X-the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter μ. a Find an unbiased estimator of μ and compute the...
5. -/2 points DevoreStat9 6.E.009. My Notes Ask Your Teacher Each of 167 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of scratches per item 0 1 2 3 4 5 6 7 Observed frequency 17 32 41 31 20 14 7 5 Let X = the number of scratches on a randomly chosen item, and assume that X has...
The shear strength of each of ten test spot welds is determined, yielding the following data (psi). 409 393 358 361 367 362 374 389 375 415 (a) Assuming that shear strength is normally distributed, estimate the true average shear strength and standard deviation of shear strength using the method of maximum likelihood. (Round your answers to two decimal places.) average 380.3 psi standard deviation psi (b) Again assuming a normal distribution, estimate the strength value below which 95% of...
Item X is a standard item stocked in a company's inventory of component parts. Each year the firm, on a random basis, uses about 3,000 of item X, which costs $25 each. Storage costs, which include insurance and cost of capital, amount to $10 per unit of average inventory. Every time an order is placed for more of item X, it costs $6. a. Whenever item X is ordered, what should the order size be? (Round your answer to the...
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