For #s 9 - 10 refer to the problem below:You were planning to open a "McJobee". In order to have an idea on how you will operate,you went to a similar restaurant and found out the data presented below:bns nesm nLet X be the amount and P(x) be the percentage of profit/ loss.bnid ynmunTo Percentage/P(x)20% lossT0 UO30%Amount (X)P50,000POP 50,000P 150,00040% profit10% profite9. What is the expected value/ total profit?a) P 400,000c) P 150,000b) P 230,000d) P 25,00010. Which of the following best interprets the expected value of the problem?a) The profit is high.b) The earnings for a year is sometimes loss and gain.c) The average profit of the restaurant is P 25,000.d) The opening of the new restaurant is not good.(3uesT ort vollum (b

Expected value is a measure of random variable which follows a probability distribution. It is…

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College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter4: Linear Functions

Section4.3: Fitting Linear Models To Data

Problem 40SE: For the following exercises, consider this scenario: The profit of a company increased steadily over...

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For the following exercises, consider this scenario: The profit of a company increased steadily over a ten-year span. Thefollowing ordered pairs show the number of units sold in hundreds and the profit in thousands of over the ten-yearspan, (number of units sold, profit) for specific recorded years: (46,250),(48,305),(50,350),(52,390),(54,410). Predict when the profit will exceed one milliondollars.
For the following exercises, consider this scenario: The profit of a company increased steadily over a ten-year span. Thefollowing ordered pairs show the number of units sold in hundreds and the profit in thousands of over the ten-yearspan, (number of units sold, profit) for specific recorded years: (46,250),(48,305),(50,350),(52,390),(54,410). Use linear regression to determine a function y,where the profit in thousands of dollars depends onthe number of units sold in hundreds.
Use the Jesaki Inc Information Below to Solve Questions 1- Below 1) Jesaki Inc estimates that it will sell N(x) units of product after spending $x thousand on advertising, as given by N(x) = -0.45 x^4 + 46 x^3 1,079 x x^2+ 161,973. What is the point of diminishing returns? Round to the nearest dollar. 2) The number x of bicycle helmets Jesaki Inc is willing to sell per week at a price of $p is given by x = a/p + b-c, where a = 80, b = 26, and c = 414. Find the instantaneous rate of change of the supply with respect to price when the price is $79. Round to the nearest hundredth (2 decimal places). 3) Jesaki Inc sponsered a blood drive following mathematical model relating systolic blood pressure and age: P(x) = a + bln(x+1), where P(x) is pressure, measured in millimeters of mercury, and x is age in years. By examining Guilford County hospital records, they estimate the values for Guilford County to be a = 43 and b = 27. Using this model, estimate the rate of change of pressure with…
For the following data, N = _____. X f 4 2 3 3 2 1 1 2
For a population with μ = 80 and σ = 10,what is the X value corresponding to z = -0.50?
In a recent marketing experiment, consumers were given one of four different types of dishwashing detergent and asked to use it for a month. At the end of that time they were asked to rate the detergent in terms of overall quality. The results are presented below. What percentage of the consumers rated their detergent average or better?
X Y 1 6 4 1 1 4 1 3 3 1 Which of the following scatterplots accurately depicts this set of scores?
For the following questions, refer to the table below. Note that X2 is a dummy variable, taking values of 0 or 1. X1 × X2 is an interaction term between X1 and X2. For a one-unit increase in X1, what is the predicted change in Y? -0.778 0.344 0.055 -0.723
We controlled this relationship for “race,” a variable that had three categories: whites, blacks, and others. Suppose you learned that the gamma for this relationship among whites was -.61, for blacks, was -.54 and for others, was -.44. What kind of elaboration, in your view, would you have uncovered?
In general, ___________% of the values in a data set lie at or below the 28 th percentile. _______________ % of the values in a data set lie at or above the 90 th percentile.. If a sample consists of 700 test scores, _________of them would be at or below the 52 th percentile. If a sample consists of 700 test scores, ________ of them would be at or above the 64 th percentile.
Let's stick with our friend Dr. Fraudulus with the red palm oil and the girls & boys with ADHD... Use the following data for the next few problems: Source SS df MS F Between treatments 800 k - 1 Factor A (dosage) 360 Levels of A - 1 SSA / dfA MSA / MSwithin Factor B (gender) 250 Levels of B - 1 SSB / dfB MSB / MSwithin A x B 190 dfA x dfB SSAxB / dfAxB MSAxB / MSwithin Within treatments (error) ΣSSinside each treatment Σdfinside each treatment SSwithin treatments / dfwithin treatments Total 5630 N - 1 SS(girls + placebo) = 760 SS(girls + low dose) = 800 SS (girls + high dose) = 770 SS (boys + placebo) = 830 SS (boys + low dose) = 850 SS (boys + high dose) = 820 Solve for the SSwithin treatments:
The population (in millions) of the United States between 1970 and 2010 can be modeled as p(x) = 203.12e0.011x million people where x is the number of decades after 1970.The percentage of people in the United States who live in the Midwest between 1970 and 2010 can be modeled as m(x) = 0.002x2 − 0.213x + 27.84 percent where x is the number of decades since 1970. How rapidly was the population of the Midwest changing in 1980 and in 1990? (Round your answers to three decimal places.)

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