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# What is the product a c x b if a i j

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first 2 weeks. 50 people who joined the programme are sampled, their weight loss is 9 pounds with a standard deviation of 2.8 pounds. Can we conclude at the .05 level that a person joining the programme will lose less than 10 pounds? (2) The following is a random sample of 90-day futures prices in dollars for 1 troy oz. of silver from The Wall Street Journal issues in May and June of 1997: 4.74, 4.77, 4.87, 4.91, 4.83, 4.72, 4.92, 4.86, 4.97, 4.71, 4.90, 4.93, 4.75, 4.88, 4.79, 4.83, 4.89. Required: a. Calculate the mean b. Median c. Standard deviation of the 90-day future price of silver data (3) A mining company needs to estimate the average amount of copper ore per ton mined. A random sample of 50 tons gives a sample mean of 146,75 pounds. The population standard deviation is assumed to be 35.2 pounds. Required: a. Give a 95% confidence interval for the average amount of copper in the population of tons mined. b. Give a 90% confidence interval for the average amount of coper per ton c. Give a 99% confidence interval for the average amount of coper per ton (4) An e-commerce Website gets 2,385 visitors on a particular day. Among these, 1790 visitors explore the products by looking at more pages at the site. Among these 1790 visitors who explore the products, 387 make a purchase. Required: a. If a visitor chosen at random from all those who visited the site, what is the probability that the visitor explored the products b. If a visitor is chosen at random from all those who visited the site, what is the probability that the visitor made a purchase. c. If a visitor is chosen at random from all those who explored the products, what is the probability that the visitor made a purchase. d. Which of the preceding three probabilities is relevant to the design of the home page that leads to product page.
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k to the lab manual is here: https://scuhs.instructure.com/courses/5548/assignments/89284?module_item_id=257602
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of Sport-Equip Ltd, a company that sells sports equipment. Some of the users who visit the website end up buying sports equipment from the website while others are simply browsing in order to obtain product information. (a) Clearly explain and justify which probability distribution you would use to describe the number of Internet users who visit the website of Sport-Equip Ltd in a one hour period. [There is no need to calculate any probabilities for this part of the question] (5 marks) (b) What is the probability that during any half-hour period, there will be less than 3 visitors to the website? (5 marks) (c) What is the probability that during any two-hour period, there will be more than 15 visitors to the website? (5 marks) (d) If a user has just visited the website, find the probability that the website will have another visitor within the next 10 minutes. In your answer, state the probability distribution you have used and explain your choice. (4 marks) (e) It is estimated that 40% of Internet users who visit Sport-Equip Ltd’s website buy a product from the company. If 100 users visit the website over a given period of time, find the probability that more than 50 of them will buy a product from the company. In your answer, state the probability distribution you have used and explain your choice
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hrough a series of redox reactions involving water and oxygen, the ultimate reaction is Fe (iron) + O2 (molecular, elemental oxygen) Yields Fe2O3 (red rust). The charge of iron in rust is +3; the charge of oxygen in rust is -2. a. What is the charge of metallic iron? Atmospheric oxygen? How do you know? b. What is oxidized in this reaction? What is reduced? 7. In raku firing of ceramics, a piece of clay is formed, then glazed, often with some type of copper, iron, cobalt, or other metallic compound. The product is removed hot from the kiln and placed in a container of sawdust, leaves, or other combustible materials. The burning quickly consumes all the oxygen, and produces a “reductive” environment. You know that the half reaction: Cu yield Cu+2 + 2 e- is an oxidation. a. Write this in reverse to show what happens to the copper ions in glazes in a reductive environment. Explain, then, why raku firing yields interesting effects.
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hrough a series of redox reactions involving water and oxygen, the ultimate reaction is Fe (iron) + O2 (molecular, elemental oxygen) Yields Fe2O3 (red rust). The charge of iron in rust is +3; the charge of oxygen in rust is -2. a. What is the charge of metallic iron? Atmospheric oxygen? How do you know? b. What is oxidized in this reaction? What is reduced? 7. In raku firing of ceramics, a piece of clay is formed, then glazed, often with some type of copper, iron, cobalt, or other metallic compound. The product is removed hot from the kiln and placed in a container of sawdust, leaves, or other combustible materials. The burning quickly consumes all the oxygen, and produces a “reductive” environment. You know that the half reaction: Cu yield Cu+2 + 2 e- is an oxidation. a. Write this in reverse to show what happens to the copper ions in glazes in a reductive environment. Explain, then, why raku firing yields interesting effects.
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tor coaches per year at \$85,000 each. The company wants to introduce a new portable camper to fill out its product line. It hopes to sell 19,000 of these campers per year at \$12,000 each. An independent consultant has determined that if Winnebagel introduces the new campers, it should boost the sales of its existing motor homes by 4,500 units per year and reduce the sales of its motor coaches by 900 units per year. What is the amount to use as the annual sales figure when evaluating this project? Why?
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

mathematicsalgebra Physics