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The presence of Heteroscedasticity can be investigated by using... .

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QUESTION 2 You work for a big retail chain that operates in a large number of regional markets and you want to investigate the effect of increased marketing spending on sales. You randomly select half of the markets and increase the marketing budget in these markets by 10%. The rest of the markets are allocated the same marketing budget as before. Then comparing the average sales in the markets with increased marketing budget and average sales in the remaining markets will give an unbiased estimate of the true causal effect of increased marketing spending on sales. True O False

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Exercise 2.2. A three-man board, composed of A, B, and C, has held hearings on a personnel case involving an officer of the company. This officer was scheduled for promotion but, prior to final action on his promotion, he took a decision that cost the company a good deal of money. The question is whether he should be (1) promoted anyway, (2) denied the promotion, or (3) fired. The board has discussed the matter at length and is unable to reach unanimous agreement. In the course of the discussion it has become clear to all three of them that their separate opinions are as follows: • A considers the officer to have been a victim of bad luck, not bad judgment, and wants to go ahead and promote him but, failing that, would keep him rather than fire him. • • B considers the mistake serious enough to bar promotion altogether; he'd prefer to keep the officer, denying promotion, but would rather fire than promote him. C thinks the man ought to be fired but, in terms of personal policy and…

A large company in the communication and publishing industry hs quantified the relationship between the price of one of its products and the demand for this product as Price = 160 -0.01 xDemand for an annual printing of this particular product. The foxed costs per year (ie. per printing) = $4T 000 and the variable cost per unit = $35. What is the maximum profit that can be achieved? What is the unit price at this point of optimal demand? Demand is not expected to be more than 7,000 units per year. The maximum profit that can be achieved is S. (Round to the nearest dolar.) The unit price at the point of optimal demand is S per unit (Round to the nearest cent)

#7 What is the expected value Sell software on own? Decision alternative Sell Company Form Joint Venture Success (0.24) 2337 Moderate Success (0.4) 2337 Failure (0.36) 2337 Success (0.24) 2500 Moderate Success (0.4) 2794 Sell Software on own Failure (0.36) 1000 Submit Answer format: Number: Round to: 0 decimal places. Success (0.24) 5000 Moderate Success (0.4) 3500 Failure (0.36) -868 unanswered not_submitted Attempts Remaining: 2

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What is the variance of u conditional on income, var(ulinc)? Consider the following savings model: Where inc = income and sav = savings A. var(inche) B. incvar(e) C. var(sqrt(inc)) D. var(e) sav= Bo + B₁inc + u, u = √inc * e

q7-  Which statement is incorrect for statistical independence between X and Y? Select one: a. The occurence of Y has no impact on the probability for the occurence of X b. If X and Y occur jointly, it is purely by chance c. The correlation between X and Y is 0 d. The correlation between X and Y is 1

A company has established that the relationship between the sales price for one of its products and the quanlity sokld per month is approximalely p=75-0. 1D (D is the demand or quantity sold per month and p is the price in dollars). The fixed cost is $1,000 per month and the variable cost is $30 per unit produced. a. What is the maximum profit per month for this product? b. What is the range of profitable demand during a month? a. The maximum profit per month for this product is $. (Round to the nearest dollar.) b. The range of profitable demand during a month is from units to units. (Round up the lower limit and down the upper limit to the nearest whole number.)

Context : The London Metro Bus is crowded for travel during peak hours. During such travel hours two daily passengers ‘James’ and ‘Robert’ enter the Metro. Luckily, two adjacent seats are free in the bus. Each of them must decide whether to sit or stand. For both, sitting alone is more comfortable than sitting next to the other person, which in turn is more comfortable than standing. Question : Assume that both ‘James’ and ‘Robert’ are altruistic, ranking outcomes according to the other person’s comfort and, out of politeness, prefer to stand than to sit if the other person stands. Model the situation as a strategic game and find any Nash equilibrium (equilibria) if it exists. Does a dominant strategy exist for either ‘James’ or ‘Robert’ with these preferences?  show ALL steps and working in support to your answer

Sonia is planning to start a new designer cloth shop. Her problem is to decide how large her shop should be.The annual returns will depend on both the size of her shop and a number of marketing factors related to thecurrent market conditions and demand for designer wear. After a careful analysis, Sonia came up with thefollowing tableSize of Shop Good Market (R.O.) Fair Market (R.O.) Poor market (R.O.)Small Scale 1024 9765 −500Medium Scale 1500 3000 −2000Large Scale 2000 3000 −4000Very Large Scale 3000 5000 −7000a) What will be her decision based on Pessimist criteria? b) What will be her decision based on Optimistic criteria? c) What will be her decision based Laplace criteria?

A potential customer has described the following scenario to you:We need to keep track of the data that our manufacturing firm needs to run smoothly.We make a number of products, each of which is manufactured by a different de-partment. Products are made up of a number of parts. Parts are bought fromsuppliers.You have been asked to perform a preliminary analysis of the scenario:a) Identify four sets of values from the scenario. b) Identify three relations from the scenario. c) Draw an entity-relationship diagram to visualise the sets and relations you have identi-fied. d) Use the relations you identified in part b) to define the following:i) A relation that records the parts that a department needs. ii) A relation that records the suppliers that a department deals with

Data 1:*2008 and 2013 National Demographic Health Survey showed that the percentage of womenage 15- 19 who had a live birth or is pregnant with first child had increased from 9.9% - 10.1% inthe country.*In Region 1, the percentage of women age fifteen 15 - 24 who havebegun childbearing also increased from 26% - 29%. This was attributed to the following riskybehaviors identified by the adolescents during the Regional Adolescent Congress: Early sex,Substance abuse, Pornography, VAWC (rape case), Fraternities (bad gangs) & Prostitution. Questions:1. What is the impact of the given data to mortality and morbidity rate of adolescent population? 2. What is the impact of the given data to mortality and morbidity rate of neonatal population? 3. Give at least 3 social determinants of health which are contributory factors leading to the datapresented and justify..

(a) The sales of a book publication are expected to grow according to the functionS = 300000(1 − e−0.06t), where t is the time, given in days.(i) Show using differentiation that the sales never attains an exact maximum value.(ii) What is the limiting value approached by the sales function?(b) A poll commissioned by a politician estimates that t days after he makes a statementdenegrating women,the percentage of his constituency (those who support him at the time hemade the statement) that still supports him is given by S(t) =75(t2 − 3t + 25)t2 + 3t + 25The election is 10 days after he made the statement.(i) If the derivative S’(t) may be thought of as an approval rate, derivate the a functionfor his approval rate.(ii) When was his support at its lowest level?(iii) What was his minimum support level?(iv) Was the approval rate positive or negative on the date of the election?(c) Lara offers 100 autograph bats. If each is priced at p dollars, it is that the demand curvefor the bast will be…

Exercise 3.2 A three-man board, composed of A, B, and C, has held hearings on a personnel case involving an officer of the company. This officer was scheduled for promotion but, prior to final action on his promotion, he made a decision that cost the company a good deal of money. The question is whether he should be (1) promoted anyway, (2) denied the promotion, or (3) fired. The board has discussed the matter at length and is unable to reach unanimous agreement. In the course of the discussion it has become clear to all three of them that their separate opinions are as follows: • A considers the officer to have been a victim of bad luck, not bad judgment, and wants to go ahead and promote him but, failing that, would keep him rather than fire him. ⚫ B considers the mistake serious enough to bar promotion altogether; he'd prefer to keep the officer, denying promotion, but would rather fire than promote him. ⚫ C thinks the man ought to be fired but, in terms of personnel policy and…

What is the difference between univariate and multivariate analysis? Give an example for when a univariate analysis might be used and an example of when we use multivariate analysis.

Jackson invested $750 into a savings bond that earned 3% interest each month. At the same time, he also began saving money in a savings account. The value of the savings account is represented by f(x)=1,000+25x, where x represents the Number of months since the account was opened. At the end how many months did the value of the savings bond first begin to exceed the value of the savings account?

Explain whether the empirical evidence supports the claim that “investors are solely concerned with mean and variance”

What is sampling? Explain the differences between probability and nonprobability samples and identify the various typesof each

Business and consumer marketers use the same set of variables to segment their markets Select one: True False

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Please solve questions 15, 16 and 17.  The multivariate demand function below will be needed for questions 12-18.   Setting: Grapple, Inc. is a leading seller of laptop personal computers.  However, they want to become a leading tablet seller, too.  Your marketing department, aided by your economics staff, has estimated a function to help you in the quest for market leader in tablets.  The variables are defined after the function. Qg = 10000 - 25Pg + 20Ph + 30Pr - 15dv - 35Psc - 10Pmm + 0.05Ag + 0.03A -25C + 0.1Y                Qg = the number of Grapple tablet computers demanded per week.   Pg = the price of each new Grapple tablet (in $).   Ph = the price of each Hewpaq tablet (in $).   Pr = the price of each Ronova tablet.   Pdv = the price to equip a tablet with Holographic digital video (in $, this is an upgrade option that enables three-dimensional graphics on a tablet.  Two-dimensional graphics is standard equipment).   Psc = the price of various screen sizes (in $, a 8 inch is…

Estimate the following model: purchase = β0 + β1traditional + β2aggregator + β3substack

FIVE. Which of the following is true about standard deviation?     The first step in calculating the standard deviation is calculating the square root.   The second step in calculating the standard deviation is to subtract each measurement from the intermediate value and then square that difference.   The last step in calculating the standard deviation is to sum the squared values and divide by the number of values minus one.   Standard deviation is a type of average where the positive and negative numbers sum to zero.   The amount of difference of the measurements from the central value is called the sample standard deviation.

1. The old adage “time is money” comes into play here, too, as saving time is often tantamount to reducing costs. (10 sentences) 2. Downside of cost cutting or cost minimization (10 sentences) 3. What is Budget Vs. Actual? Why is it Important? What Causes the Variance? What is the implication of having a good variance-analysis in the company? (10 sentences)

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