Mathematics, 18.12.2019 01:31 donald1255
Two companies manufacture a rubber material intended for use in an automotive application. the part will be subjected to abrasive wear in the field application, so you decide to compare the material produced by each company in a test. twenty-five samples of material from each company are tested in an abrasion test, and the amount of wear after 1000 cycles is observed. for company 1, the sample mean and standard deviation of wear are ¯x1 = 20 milligrams/1000 cycles and s1 = 2 milligrams/1000 cycles, and for company 2, you obtain ¯x2 = 15 milligrams/1000 cycles and s2 = 8 milligrams/1000 cycles. you will assume σ 2 1 6= σ 2 2 for this problem, so there will be separate estimates for σ2=1 and σ2=2. do the data support the claim that the two companies produce material with different mean wear? use α = 0.05, and assume that each population is normally distributed but that their variances are not equal. what is the p-value for this test?
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Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?
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Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee
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70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?
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Mathematics, 22.06.2019 01:00, imamnaab5710
3questions show how you solved the problem 1. subtract & simplify (–y2 – 4y – 8) – (–4y2 – 6y + 3) 2.multiply and simplify 2x2y3z2 · 4xy4x2 3.multiply and simplify (x – 4) (x2 – 5x – 6)
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Two companies manufacture a rubber material intended for use in an automotive application. the part...
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