Instruction: Compute for the regression line and interpret the results (An executive at a telecommunications company is interested in the relationship between an individual's incomeand mobile phone usage. In particular, to help her in pricing and marketing strategies, she is interested inascertaining whether she can use an individual's gross annual income to predict how much time they spendmaking national calls from their mobile phone per week.Annual income ('000)Weekly time on national calls (minutes)2369292995102118126125354246505413817864156661847617678225She surveys 12 mobile phone users and records their annual incomes and time (in minutes spent makingnational calls each week). The data are presented in sequence, according to gross annual income.

Regression: The regression analysis is conducted here by using EXCEL. The software procedure is…

Answered: An executive at a telecommunications…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An environmental engineer wants to evaluate three different methods for disposing of nonhazardous chemical waste: land application, fluidized-bed incineration, and private disposal contract. Use the estimates below to help her determine which has the least cost at /= 15.00% per year on the basis of an annual worth evaluation. First Cost AOC per Year Salvage Value Life Land $-145000 $-86000 $23000 4 years Incineration $-760000 $-70000 $260000 6 years Contract O $-132000 O 2 years
For each problem, select the best response. (a) The Columbus Zoo conducts a study to determine whether a household's income can be used to predict the amount of money the household will give to the zoo's annual fund drive. The response variable in this study is A. the amount of money a household gives to the zoo's annual fund drive. B. all households in Columbus. C. the Columbus Zoo. D. a household's income. E. None of the above. (b) A researcher measures the correlation between two variables. This correlation tells us A. whether a cause-and-effect relation exists between two variables. B. the strength of a straight line relation between two variables. C. whether there is a relation between two variables. D. whether or not a scatterplot shows an interesting pattern. E. None of the above. (c) A researcher wishes to determine whether the rate of water flow (in liters per second) over an experimental soil bed can be used to predict the amount of soil washed away (in…
Coconut groove claims it's still the best in Ghana despite stiff competition from fiesta royal, La palm and others. It has embarked on a price restructuring and adverts to boost demand for the coming year. It has a number of meals served which is regressed against average price per meal( P in GHS), Competitors price( P in GHS ), adverts in each outlet immediate service area (A in GHS), the average income per household in each outlet service area (Y in GHS). Use this information to answer the questions below. Q P PC A Y Q 1.00 P -0.73 1.00 PC 0.41 -0.11 1.00 A 0.31 -0.08 0.43 1.00 Y 0.38 0.03 -0.19 -0.20 1.00 1. Which three pairs of variables are perfectly correlated. 2. Which the three pairs of variables are maybe mostly strongly correlated with the response variable. 3. Which three pairs of variables I may be mostly multicollinear. 4. Which three pairs of variables are least multicollinear. 5. Which three pairs of variables are…
Compare the primary types of forecasting methods used to determine demand.
Briefly explain how the organization forecast sales for its products.a. Using historical sales data, choose a quantitative technique to forecast sales for thatorganisation for the next sales period. Comment on the appropriateness of thetechnique used.b. Describe three strategies that the organization uses to compete and comment on theappropriateness of these strategies
Total DVD and Blu-ray disc sales in 2009 were $8.72 billion. For the purposes of this problem, you will combine DVD and Blue-ray disk sales into one category of DVD sales. A study by In-Stat predicted that "physical disc sales will decline by $4.7 billion by 2014," and that "streaming, on the other hand, should grow from its current $2.2 billion to $6.3 billion over the same time period (2009–2014). d. Write an equation that represents the linear model for streaming videos. Let S = the total sales of streaming videos in billions of dollars, and t = the number of years after 2009. e. In what year do the models predict streaming video sales to exceed DVD sales?
The marketing manager of "ABC Tapes" wants to assess the competitiveness of the company's product in the market. Table 1 represents the prices and quantities of blank cassette tapes sold in January 2016 and January 2020. TABLE 1 2016 2020 Length of tapes Price Quantity Price Quantity 30 minutes R 4.00 32 R 5.60 40 60 minutes R 4 30 150 R 6.15 190 90 minutes R 4.60 100 R 7.40 130 Using 2016 as base and calculate for 2020 the following: Determine the Laspeyres price index: a) 149.492 Ob) 149.367 Oc) 66.949 d) 66.893
An fruit grower knows from previous experience and careful data analysis that if the fruit on a specific kind of tree is harvested at this time of year, each tree will yield, on average, 127 pounds, and will sell for $4.6 per pound. However, for each additional week the harvest is delayed (up to a point), the yield per tree will increase by 2.1 pounds, while the price per pound will decrease by $0.07. A) How many weeks should the grower wait before harvesting the apples in order to maximize the sales revenue per tree? (Round your answer to the nearest tenth of a week.) Answer: __________ (rounded to the nearest tenth) B) Use your answer in part A to find the actual maximum revenue that can be expected. (Round your answer to the nearest dollar.) Answer: ____________ dollars (rounded to the nearest dollar)
Construct dummy tables corresponding to the following research objectives To compare the nutritional status of the breast, bottle, and mixed-fed babies. To determine the relationship of the patient's compliance to medication for hypertension with his age and the severity of his disease.
In a given year, the U.S. federal income tax owed by a married couple filing jointly can be found from the following table. Married Filing Jointly Taxable Income $0-$18,550 T(x) = $18,551-$75,300 $75,301-$151,900 amount over $75,300 $413,351-$466,950 Tax Rate 10% $1,855 plus 15% of the amount over $18,550 $10,367.50 plus 25% of the $151,901-$231,450 amount over $151,900 $466,951 or more if $29,517.50 plus 28% of the $231,451-$413,350 amount over $231,450 $51,791.50 plus 33% of the $130,578.50 plus 39.6% of the amount over $466,950 (a) For incomes up to $151,900, write the piecewise defined function T with input x that models the federal tax dollars due as a function of x, the taxable income dollars earned. $111,818.50 plus 35% of the amount over $413,350 0 < x≤ 18,550 if 18,550 < x≤ 75,300 if 75,300 < x≤ 151,900 (b) Use the function to find T(40,000). $ (c) Find the tax due on a taxable inco of $90,000. $ (d) A friend tells Jack Waddell not to earn any money over $75,300 because it…
Joe, the owner of Genuine Reproductions (GR), a company that manufactures reproduction furniture, is interested in measuring inventory effectiveness. Last year the cost of goods sold at GR was $3,000,000. The average inventory in dollars was $250,000. (a) Calculate the inventory turnover for GR. (b) Calculate the weeks of supply. Assume 52 weeks per year. (c) Calculate the days of supply. Assume that GR operates 5 days per week.
An enquiry into the budgets of middle class families in Mumbai gave the following information : Clothing Fuel 20% Expenses on Food Rent Misc 35% 15% 10% 20% Pace (2016) ($) ence (2017) ($) 2500 2000 1400 400 600 2850 2200 1498 500 960 What changes in the cost of living figure of 2017 have taken place compared to2016?

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