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Mathematics Questions and Answers August 22, 2022

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2. Please share the histogram and Box plot for the following variables: PercentMale and GroupSize. You can save the graphs in PDF or . JPG format. 3. Please share descriptive statistics of the whole data. Please also present descriptive statistics separately for the following variables: PercentMale, NumberTeamLead, and GroupSize. 4. Please use the

What color does a sunset cause scenery to take on before the sun sets, and right after the sun sets? Group of answer choices Golden before and blue after Pink before and golden after Blue before and golden after Red before and blue after Blue before and red after

A lab experiment measured the concentration of a certain hormone in albino mice after treatment with a hormone releasing factor.The experimental hypothesis was that the mean amount of the hormone would be more than twice what it normally is without the hormone releasing factor.They ran a one-sided test of significance at the 5% significance level

1)-Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put52tons of coal into each car. The actual weights of coal loaded into each car are normally distributed , with mean =52tons and standard deviation =0.7ton. What is the probability that49cars

1. question How much should a healthy Shetland pony weigh? Let x be the age of the pony (in months), and let y be the average weight of the pony (in kilograms). x 3 6 12 16 24 y 60 95 140 166 189 (a)Make a scatter diagram of the data and visualize the line you think best fits the data. (Submit a file with a maximum size of1 MB.) (b)Would you say

1- quelles conditions doit-on satisfaire pour qu'on puisse recourir un test paramtrique 2-Nommez 5 statistiques descriptives univaries. 3-Nommez 3 mesures de dispersion. 4-Si on obtient des donnes sur la totalit d'une population, comment infrons-nous ces rsultats 5-Donnez un exemple de chacun de ces types de variable: nominale, ordinale, cardinale.

so. The price-earnings ratios of a sample of stocks have a mean value of 13.5 and a standard deviation of 2. If the ratios have a bell shaped distribution; what can we say about the proportion of ratios that fall between 11.5 and 15.5? a. The interval contains approximately 5056 of the ratios, according to the Empirical Rule is. The interval
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Complete the statement: two of the solutions of cos (pi divides by 2) = -(sq rt 2 divides by 2) are

a) Let i C be a square root of 1 and let , Z[i] be nonzero. If | and | , then = or =

For n=3 and =0.47, what is P(X=0) P(X=0) = (Round to four decimal places asneeded.)

12. The data set: weekly grocery bills (in dollars) for 20 randomly selected households 135 120 115 132 136 124 119 145 98 110 125 120 115 108 110 105 116 121 125 108 Construct a frequency distribution for the data and state whether the distribution is bell-shaped, uniform(symmetric), skewed to the left, or skewed to the right. Use six classes of
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1 statistics Wait-Times: There are three registers at the local grocery store. I suspect the mean wait-times for the registers are different. The sample data is depicted below. The second table displays results from an ANOVA test on this data with software. Wait-Times in Minutes IX ANOVA Results Register 1 2.0 2.0 1.1 2.0 1.0 2.0 1.0 1.3 1.55
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Review the document, "Multiplication and Division Situations: Array, Equal Groups, and Compare." Think about how addition/subtraction and multiplication/division situations are alike and how they are different. Review the document, "Math Drawing Techniques." Note the different methods that are used to represent addition/subtraction and

Calculate simple interest given the following information. Round to the nearest dollar. Reminder that the formula for simple interest is I = prt. Principal Rate Time Interest 1. $200 2% 1 year $4 2. $500 4% 1 year $20 3. $900 5% 1 year $ 4. $600 7% 1 year $42 5. $2,350 8% 2 years $1

Suppose Mendel predicts that roughly 25% of pea plants are yellow and a researcher determines a 95% confidence interval of a sample to be (0.3235, 0.3728). Which conclusion is true? A) There is a 95% chance that Mendel is correct that the proportion is exactly 25% B) One can be 95% certain that the true proportion of yellow pea plants falls in the

Answer the following questions after reading the article below: Managerially differences in numbers may be useless? Do differences in numbers mean things are significantly different? Take a customer satisfaction rating of 3.9. If you implemented a program to improve customer satisfaction, conducted some polling several months out to test the

A+ bakery uses vanilla extract in the baking of their cookies. A small bottle of vanilla extract has 16 a aunces in it. If each batch of cookies baked requires 2/3 of an ounce of vanilla how many times can the bakery use the bottle before it is empty

According to a 2009 Reader's Digest article, people throw away about 10% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 118 grocery shoppers to investigate their behavior. What is the probability that the sample proportion does not exceed 0.14? (Enter your answer as a number accurate to 4

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An investor has to chose between two investors whose returns are x 1 normally distributed with a mean return of 8% and a standard deviation of 10%, and x 2 normally distributed with a mean of 7% and a standard deviation of 9%. The investor wants to minimize the probability of earning less than 5%. Which one of these two investors should she select?

11.3- Which activity (correlation or regression analysis) is involved in each of the following situations? a. Investigating to see whether there is any measurable connection between advertising expenditures and sales. b. Developing a system to predict portfolio performance based on changes in a major stock market index. c. Constructing a budgeting

The question below regards to my biology homework. I was hoping that someone would be able to help me work through this problem as I am not entirely sure how to do it and if I did it correctly. We are supposed to use Microsoft Excel to create a standard curve with the data shown below. Our figure is supposed to include all labels such as axes, the

In a Borda count vote to choose one of three possible new foods to be served in the dining hall, tikka masala receives 12 first place votes, 5 second place votes, and 7 third place votes. What is the Borda count score for tikka masala? A) 29 B) 24 C) 12 D) 53

A technician compares repair costs for two types of microwave ovens (type I and type II).He believes that the repair cost for type I ovens is greater than the repair cost for type II ovens.A sample of 34 type I ovens has a mean repair cost of $70.86.The population standard deviation for the repair of type I ovens is known to be $12.35.A sample of

A movie grossed a total of 6 . 8 3 10^6dollars. Total attendance was 7 . 7 9 10^5for movies that year. What was the average ticket price for the movie? The average ticket price for the movie was $________ . (Round to the nearest cent as needed.)

Which of the following is equivalent to log 9 ( x y ) ? Select the correct answer below: log 9 x log 9 y log 9 y log 9 x log 9 x log 9 y log 9 x log 9 y

11. You have a diffraction grating apparatus with a variety of line densities and a 425 nm purple laser. You would like to produce a bright fringe at an angle of 33 from the right bisector. What are two different line densities you could use to produce this result

In a survey of a group ofmen, the heights in the20-29 age group were normallydistributed, with a mean of 69.8 inches and a standard deviation of 2.0 inches. A study participant is randomly selected. Complete parts(a) through(d) below. a) Find the probability that a study participant has a height that is less than 66 inches. The probability that

The manufacturer of a new racecar engine claims that the proportion of engine failures due to overheating for this new engine, (p1)(p1) , will be no higher than the proportion of engine failures due to overheating of the old engines, (p2)(p2) . To test this statement, NASCAR took a random sample of 175175 of the new racecar engines and 195195 of

(a) Use triple integral to find volumeof region that isbounded by graphs of equations:- y 2 +x 2 = 9 , x+z = 5 , z= 1 Could we find volume by double integral ?If yes, then write double integral for volume of regionthat is bounded by graphs of above equations .

In hypothesis testing the objective is to determine how probable it is that. Denote with the p=

PART 1: 1. Trial 3 has the following numbers: 74.1, 75.7, and 1.6. Wr'te a sentence (or two) explaining what those represent in terms of glide distances. In Trial 3, the glide distance when windmilling was 74.1 units, and when stopped, it increased to 75.7 units. The difference between the stopped and windmilling glide distances for this trial is

Findand interpret f(1),f(1 ) for Question#11 only. \f13. Iff(x) = (4x - 1)(2x - 3), find a . f(1 ) . b. f' (1). c. f"(1). d. the values of x for which f(x) = 0. e. the values of x for which f'(x) = 0.15. Business: Prudustinn Busts Suppose that C(x} represents the cost [in dollars} to a manufacturer for producing x decorative throw pillows.
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2. There are two national college-entrance examinations, the SAT and the American College Testing program (ACT). Scores on individual SAT exams are approximately normal with mean 500 and standard deviation 100. Scores on the ACT exams are approximately normal with mean 18 and standard deviation 6. (These are the distributions for a large reference

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used to estimate this probability. If so, approximate P(X) using the normal distribution and compare the result with the exact probability. nequals 48, pequals 0.3, and Xequals 16 Compute P(X) using the binomial probability formula. Then
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Algebra and Composition of Functions Create and evaluate functions formed by using algebraic operations and composition of functions. Let f left parenthesis x right parenthesis equals 4 x minus 3 and g left parenthesis x right parenthesis equals 8 x squared - 15. Find and simplify the functions left parenthesis g - f right parenthesis left

The following graph is the production possibilities curve of a nation. A graph plots drill presses versus bread. The graph is a concave downward curve.The horizontal axis is labeled bread. It ranges from 0 to 4 in increments of 1. The vertical axis is labeled drill presses. It ranges from 0 to 10 in increments of 2. The graph is a concave downward

4. (8 points) Find the 3x3 matrix that corresponds to the transformation of a rotation of 60 (ccw) about the point (2, 5). 5. (20 points) Let A = [; ; (a) Find the eigenvalues of A. (b) Find the eigenvectors of A corresponding to the eigenvalues in part (a). (c) Find the matrices D and P such that A = PDP1, (d) Compute A
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Sketch a graph of the piecewise function f(x){ -2x if x -2 x- 3 if -1 < x 2 1 - x if x > 2

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Note : this assignment is focused on ANOVA problems Using the calculated margin of error and the pairwise confidence interval approach, test the following statements: i. Under normal summer road conditions, does light vs. heavy cannabis intake makes a significant difference on driving abilities if you wait 4 hours before driving? ii. After a heavy
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4. (15 pts) Consider a simple system with a single arrival stream and a single server. The following is data recorded for 10 minutes, where n(t) is the number of people in the system at time t. 3 t (min) 5 6 17 8 9 10 3.9 5.6 6.66.8 8.4 9.3 Based on the data, please determine the following a) (5 pts) The total time in the system for the third
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Please solve this questions 9 to 14 and please tell me how it works Problems 9 and 10. Use the following information to answer the questions. (Note: When interpreting a decision you must say something about the claim.) Weights. A government worker claims that the standard deviation of the mean weight of all U.S. Postal Service shipments is 0.40
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Saved Help Say 1,000 812 9 800 600 601 400 200 Last Year This Year (a) What kind of display is this? O Line chart Column chart with pictures for columns O Pie chart (b-1) Identify its strengths, using the tips and checklists shown in this chapter. (You may select more than one answer. Click the box with a check mark for the correct answer and

Hi, I need help with solving probability. An elevator has a placard stating that the maximum capacity is 2475 lb15 passengers. So, 15 adult male passengers can have a mean weight of up to 2475/ 15 = 165 pounds. If the elevator is loaded with 15 adult male passengers. nd the probability that it is overloaded because they have a mean weight greater
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Write the equation of the line passing through the given pair of points. (5,1) and (3,7)

Help Desk: There are four student employees at the Computer Help Desk. The supervisor wants to determine if there is a difference in the mean number of clients served per hour between the four employees. The data from a random selection of hours is depicted below. The second table displays results from an ANOVA test on this data with software. The

025 expressed as a percentage is? 1/8 expressed as a percentage is? 20% expressed as a fraction is

A national caterer determined that 37% of the people who sampled their food said it was delicious. A random sample of 144 people is obtained form a population of 5000. The 144 people are asked to sample the cater's food. If p is the sample proportion saying that the food is delicious, what is the standard deviation of p.

Which of the following goals is written in a measurable behavioral objective format: XX will correctly produce the /l/ blend in the initial position of modeled words with 90% accuracy. XX will correctly produce the /l/ blend during conversational speech. XX will produce /l/ blends in the initial position of words. All of the above

Use the method of partial fractions to verify the following integral: Z 4x 2 + 2x 1/ x 3 + x 2 dx (Integral symbol, 4x squared + 2x - 1 divided by x cubed + x squared) Tutor, can you give explanation at each step and please write legibly. Thank you

It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in

Which components of the standards should you include in the lesson plan? Group of answer choices Just the first component: standard section title. The first two components: standard section title and domain. Three components: standard section title, domain, and standard number. All four components: standard section title, domain, standard number,

The manufacturer of a new racecar engine claims that the proportion of engine failures due to overheating for this new engine, (p1)(p1) , will be no higher than the proportion of engine failures due to overheating of the old engines, (p2)(p2) . To test this statement, NASCAR took a random sample of 175175 of the new racecar engines and 195195 of

So you took Stats I and Methods One at FIU and passed. But do you remember what you did, how you did it, and why you did it? If you need some basic reminders for the chi square, then this is the lecture for you! I am going to talk about a chi square example in this document that corresponds to the example you saw in the Descriptive Statistics
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I need help understanding how to tackle these. I tried different methods and I can't come up with a solution. Sketch the graph of the inequality. y x Nood Help? 7. [-/0.45 Points] DETAILS LARCOLALG10 6.5.011. Sketch the graph of the inequality. Graph Layers . CO Aller you add an ched to the guph you can use Graph Layers to view and edit its
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Consider the twosided twosample ztest for two independent normal populations with unequal variances. (a) State the null and alternative hypotheses, the test statistic, and the critical region of this test. (b) Show that the sample size required for this test to ensure a signicance (0% +a)(za/2+z)2 62 is the difference between the true mean of the
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6.) The length of New Zealand (NZ) rivers that travel to the Pacific Ocean are given in table #9.3.7 and the lengths of NZ rivers that travel to the Tasman Sea are given in table #9.3.8 ("Length of NZ," 2013). Estimate the difference in mean lengths of rivers between rivers in NZ that travel to the Pacific Ocean and ones that travel to the Tasman
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Please help me solve the problem below with steps. Thank you \f
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@ Question 3 v Given the given cost function C(z) = 8850 + 620z + 0.2z and the demand function p(z) = 1860. Find the production level that will maximize profit. @ Question 4 v A baseball team plays in a stadium that holds 46000 spectators. With the ticket price at $9 the average attendance has been 19000. When the price dropped to $6, the average
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The sum of three numbers is 21. The sum of twice the first number, 3 times the second number, and 4 times the third numb number is 23. Find the three numbers. first number: [ second number- | | _ third number: [ ) er is 65. The difference between 5 times the first number and the second
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Help with the following question that has a few parts! Thank you! Researchers that you work with were interested in the effect of a drug on the resting heart rate of individuals. They recruited 12 individuals to take part in their study. They decided to take the resting heart rate before the drug was taken. The subjects then took the drug, and the
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Find all relative extrema of the function. f(x)=2-(25-6x+x^2)

The principal at Crest Middle School, which enrolls only sixth-grade students and seventh-grade students, is interested in determining how much time students at that school spend on homework each night. The table below shows the mean and standard deviation of the amount of time spent on homework each night (in minutes) for a random sample of 20

Question 1 - 15 marks You should be able to answer this question after studying Unit 7. Differentiate the following functions, simplifying your answers as far as possible. (a) f(z) = x?sin(2x) 3 (b) g(y) = tan(y)yl sec(y) (c) h(z)= (e' +2%)* (d) k(t) =sin(t2 + 1) cos(t? 1) Question 2 - 10 marks You should be able to answer this question after
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1.It is well known that about 14% of people are left-handed.Consider a simple random sample of 8 people. Using Binomial Distribution, find the probability ( rounded to four decimal places ) that the number of people who are left-handed would be: a)At most 3b) Greater than 4

An appropriate test to perform when evaluating the mean of a single dependent variable among more than 2 groups or samples is: T-Test Pearson's Correlation Chi-Square ANOVA

Onestudy, based on responses from 1,012 randomly selectedteenagers, concluded that 42% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of all teenagers in the population feel that grades are their greatest source of pressure.

A person drives 20,000 miles per year, using a car with a fuel efficiency of 20 miles per gallon of gasoline. Assuming that the average price of gasoline is $3.50 per gallon, how much money would this person save in a year by switching to a car with a fuel efficiency of 50 miles per gallon of gasoline?Sam typed 6 letters, each of which had either

According to Keller, what does Ecclesiastes tell us about work? Group of answer choices The goal of work is to maximize pleasure and minimize pain. Work apart from God is meaningless. Work is a result of man's sin. None of these

Quadratic Q) What is the equation of the parabola with vertex (0,3) and passing through (2,7)?

QUESTION 2 Waiting Line Models Show all your work/calculations in a separate Excel/Word/PDF file that you will be uploading separately in the next question. Pay special attention to the Average Waiting times and Total Time Cost per hour. During the Coronavirus pandemic, Bobby's restaurant is only open for drive-through and wants to provide quick

2. Solving a polynomial equation f(x)=6x^3+25x^2-24x +5 (a) Using the above function, demonstrate use of the Rational Root Test to list (unrepeated) all the potential rational zeros. (b) Using the above function, demonstrate the following: (i) selecting divisors from the potential rational zeros, (ii) using Remainder Theorem to check whether it is

1.Assume a customer, who used to pay the dues in time earlier, has suddenly defaulted. A couple of reminders sent to him fail to get any response. As a credit manager, you have two issues to decide. You have to first decide whether to continue the supply to the customer on credit basis. The second issue is how to deal with the customer to recover

If the conditional statement "If my dog gets out, he will run away," is true, which other statement must also be true? If my dog runs away, he got out. If my dog did not run away, he did not get out. If my dog did not get out, he did not run away. None must be true

You have a bag that contains 4 blue marbles and 6 red marbles. You choose 7 marbles at random (without replacement). Let

Assume the random variable x is normally distributed with mean mu =86 and standard deviation =5 Find the indicated probability. P(73

A class consists of 30 males and 20 females. If one student is randomly selected from the class, what is the probability of selecting a male? Select one: a. 30/50 b. 1/30 c. 30/20 d. 20/50

If data set A has a larger standard deviation than data set B, what would be different about their distributions? Data set A would have more data near the center of the distribution Data set A would have most of its data to one side of the distribution Data set A would have flatter distribution with more data in each tail Data set A would have a

If P(B)=0.65, P(A | B)=0.30, P(Upper B prime)= 0.35, and P(A | Upper B prime)=0.80, find P(B | A).

A products has two plants "I" and "II" which produce watch hardware. There are 100 units of hardware available in plant "I" and 110 units available in plant "II". The hardware are to be shipped to two main assembly plants A and B. The shipping costs per unit to assembly plants A and B from Plants I and II are as follows: To From A B I 100 60 II

Suppose we wish to test H 0 : 0.66 versus H 1 : < 0.66. What will result if we conclude that the population proportion is less than 0.66 when its true value is really 0.68? Select one: a.We have made a Type II error. b.We have made a Type I error. c.We have made a correct decision. d.None of the answers listed here are correct.

Isabellah and Jwliannah are selling clothes at a tie dye booth at the street fair. They have been saving money to open their own store. They sell clothes at a different craft fair every weekend. Isabellah and Jwliannah want to save a little bit every weekend in a high-interest savings account. They need to save $15,750 for a 10% down payment to

Part A. [Arranging an orthogonal design problem} 1. verify that Xg = U and X: are orthogonal. 2. Compute a corrected version of X2 that is orthogonal to U by guessing X2 = X2 cU. Thus Xg,X1,X2 comprise an orthogonal design problem. 3. lGompute the squared lengths of these orthogonal 1rectors. 4. Check your answer using Excel and display the R2
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A dealer in recycled paper places empty trailers at various sites. The trailers are gradually filled by individuals who bring in old newspapers and magazines, and are picked up on several schedules. One such schedule involves pickup every second week. This schedule is desirable if the average amount of recycled paper is more than 1,600 cubic feet

Please answer the following questions as soon as possible. Please write the steps, but without explanation. Thank you very much. Use the definition of derivative (mtan) to determine the equation of the line tangent to the curve for the following functions at the indicated points. 20. f(x) = x3+ 1 at P(1,2)\f
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Given the following regression output, calculate R-squared statistic and explain what it means. SUMMARY OUTPUTB Regression Statistics Multiple R 0.961198 R Square "A" Adjusted R Square 0.917561 Standard Error 4.970188 Observations 14 ANOVA df SS MS F Significance F Regression 3098.995392 3598.995 145.692 4.53E-08 Residual 12 296.4331793 "B" Total
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2 multiple choice questions Multiple Choice Question Suppose the reaction time at a traffic light that a driver takes to brake is normally distributed with mean u = 1.25 seconds and standard deviation o = 0.2 seconds. What is the probability that the time to react to a red traffic light will be larger than 1.75 seconds? A. 0.1054 B. 0.2397 C.
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A discount of 40 percent of the original selling price of an item reduces the price to $72. Quantity A Quantity B The original selling price of the item $120 A farmer has two large plots of land that are equal in area. The first is divided into 16 lots with a acres in each lot, and the second is divided into 20 lots with b acres in each lot.

2. Find the optimal volume and greatest possible profit for a manufacturer of automatic washers, if x hundred units will sell at a price of 600 - 5x dollars per unit and the cost function, in dollars, is C(x)=200 000 + 20 000 x + 500 x ^ 2 .

A catering service offers7 appetizers,12 main courses, and6 desserts. A customer is to select2 appetizers,2 main courses, and3 desserts for a banquet. In how many ways can this be done?

An institutional research administrator believes that there is a direct relationship between a student's GPA and their score on a senior Aptitude Test. The following data show the results of 10 student's grade point averages (X) and their aptitude test score (Y). a.Develop an estimated regression equation relating GPA and Aptitude Test score. Use
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1) If we wish to determine whether there is evidence that the proportion of items of interest is the same in group 1 as in group 2. the appropriate test to use is A) the X2 test. B) the Z test. C) Both A and B. D) Neither A nor B. 2) General Mills is considering offering a new type of yogurt. To gauge interest, they are performing taste tests at
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Solve each optimization problem. a) Let x and y be two positive numbers such that x+2y=50 and (x+1)(y+2) is a maximum. b) We are going to fence in a rectangular field. If we look at the field from above, the cost of the vertical sides are $10/ft, the cost of the bottom is $2/ft, and the cost of the top is $7/ft. If we have $700, determine the

Hello I need help with this homework question, if possible please. The question is "In this question, you will construct a theoretical waiting time distribution. Boxes of Post's Cocoa Pebbles recently contained one of the four endangered animal stickers: a parrot, an African elephant, a tiger or a crocodile. Suppose 4,096 children want a sticker

HOMEWORK EXPECTED VALUE AND SAMPLING DISTRIBUTIONS EXPECTED VALUES: E(X) = X i P(X i ) EXPLAIN ALL ANSWERS PROBLEM 1 (8 points): What is the expected value of a lottery ticket where there are only four chances in a million of winning the grand prize of $20 Million? PROBLEM 2 (8 points): You have been offered a chance to purchase a lottery ticket

Nikki was asked by her teacher to draw a Venn diagram given the following information: U in the universal set A and B are subsets of U n(U)=40 n(A)=16 n(B)=19 n(AUB)'=8 For this diagram the values Nikki would use for i and ii are ? and ? \f
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