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Let an = 1 n(n+1) : Compute a1; a1 +a2; a1 +a2 +a3; a1 +a2 +a3 +a4. Then guess a1+a2+ +an for any natural number n. Use both mathematical induction and direct approach to verify your guess.
Business Economics, Economics
There are two firms that produce large commercial airplanes, namely, Boeing and Airbus. Boeing and Airbus have different flight control systems, with many pilots preferring one system over the other. The Airbus A380 has ...
How do changes in income affect consumption (and saving)? What are factors other than income that can affect consumption?
How do you find the sum of X and Y Values combined when you are doing linear correlation coefficient?
Let X denote the number of spots on a single throw of a fair 6-sided die. Find the mean, variance, and standard deviation of X. If you can, relate the mean and variance to the mean and variance. the possible values on th ...
A financial analyst examined the possible returns from several financial investments. When the performance of these investments was later examined, it turned out that 25% performed much better than the market average, 25 ...
Research Scenario: A social psychologist is interested in whether the number of days spent in a refugee camp predicts trauma levels in recently resettled refugees. He interviews 17 refugees to determine how many days th ...
A sample of 100 randomly selected students found that the proportion of students planning to travel home for Thanksgiving is 0.68. What is the Standard Deviation of the sampling distribution?
Manny, Moe and Jack have the following demand curves for pears: QManny = 100 - 2P = 70 - 2P + 10 Ppear + .25 YManny where P Pear = 2 and YManny = 40. QMoe = 300 - 4P = 80 - 4P + 35 Ppear + .75 YMoe where P Pear = 2 and Y ...
You work for a firm that manufactures DVD players. Your DVD players last an average of 800 days with a standard deviation of 200 days. You want to set the warranty length such that you only have to replace 1.5% of all th ...
50% of the cars in a dealer lot are red, 20% are black, and 16% are white. The remainder are some other unspecified color. Salespersons randomly shows three cars to three different customers. What is the probability the ...
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