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Mathematics Questions and Answers April 06, 2023

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Below is a table listing the prices of the same seven items purchased at Food & More and at Food Basket. A table lists the prices of the same seven items purchased at two grocery stores. Food and More: One dollar and 20 cents. Three dollars and 60 cents. Two dollars and 50 cents. 80 cents. Five dollars and 40 cents. One dollar and 30 cents. Six

A set of final exam scores in astatistics course was found to be normally distributed, with a mean of 82 and a standard deviation of 6. Only 30% of the students taking the test scored higher than what value (rounded to the closest integer)?

Suppose X is normally distributed with mean 50 and standard deviation 4. Find the probability of P ( - 2.5 X + 2.5 ) 0.9544 0.9974 0.9876 1.00

At a large company, the Director of Research found that the average work time lost by employees due to accidents was104hours peryear.She used a random sample of15employees.The standard deviation of the sample was5.4hours.Estimate the population mean for the number of hours lost due to accidents for the company, using a99% confidenceinterval.Assume

Question 13 / 1 point The data below represents yearly car insurance premium in the US for 10 randomly selected drivers. Assuming the data is normally distributed, test the claim that the average yearly car insurance premium for a person in the US is $1,916 using a level of significance of 1%. 1905,1940,1939,1952,1931,1937,1920,1913,1928,1934

A sunglass manufacturer currently sells one type of sunglasses for $4 a pair.The price and the demand for these glasses are related by x = f(p) = 7,000 - 500p a. Find the elasticity of demand, E(p). b. What is the elasticity of demand when p = $4? c. If the current price is increased by 10%, what is the approximate change in demand
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Given a set of data the question posed is, are these data valid? How do you determine the validity of a dataset?

You pay $5600 for a municipal bond. When it matures after 16 years, you receive $11,500. The total return is ? (percentage)

Assume that females have pulse rates that are normally distributed with a mean of mu equals 75.0 =75.0 beats per minute and a standard deviation of sigma equals 12.5 =12.5 beats per minute. Complete parts(a) through(c) below. a. If 1 adult female is randomlyselected, find the probability that her pulse rate is between 68 beats per minute and 82

Jobs arriving to a computer server have been found to require CPU time that can be modeled by an exponential distribution with mean 140ms . The CPU scheduling discipline is quantum-oriented so that a job not completing within a quantum of 100 ms will be routed back to the tail of the queue of waiting jobs. Find the probability that an arriving job

Do you know any data collection situations for which a researcher might have reason to hope for a HIGH standard deviation instead of a low one?Explain why

The waiting times between a subway departure schedule and the arrival of a passenger are uniformly distributed between 0 and 6 minutes. Find the probability that a randomly selected passenger has a waiting time greater than 4.25 minutes. Find the probability that a randomly selected passenger has a waiting time greater than 4.25 minutes.

I am very confused. Please help 5. (30 points) Suppose X has a binomial distribution with parameters 11 = 100 and p = 1/25. (a) What is the variance of (5X + 7) / 2? (b) 1P{X g 1} z ?e_?. Fix the r.h.s. by putting in the appropriate numbers in place of the question marks. (c) Compute ]E[(26]X]
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any help please.. At Denver International Airports, 87% of recent flights have arrived on time. A sample of 11 flights is studied. Round the probabilities to 4 decimal places. a) Find the probability that all 11 of the flights were on time. b) Find the probability that exactly 9 of the flights were on time. c) Find the probability that 9 or more
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Planet BAJOUR Entire Federation of Planets Latinum spent in recovering of Average Average Wastel and after No. of Expense Stan. No. of Expense Stand. the Great War Observations Per Dev Observations Per Dev of Supremacy on hectare hectare star-date 99880 50 67.74 4.06 123 55.56 9.23
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In 2012, 42.5% of full-time college students at public colleges received student loans. If there were 1,766,400 full-time students, how many received loans?

Please help with these two practice math questions. Show work. \f\f
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I can't determine what describes the samples of students and attendees? (a) Counselors at a college want to poll students about how much time the students spend studying. Which of the following best describes a cluster sample of students? 0 The counselors form groups of 30 students based on the students' majors. Then, the counselors select all of
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Please help solve this question 6. Consider the curve with parametric equations T = sint = sin (2t) for 0
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in the selected answers of a mathematics text there is an average of 3 incorrect answers per 1000 questions. find the probability that there are 14 incorrect answers in a set of 5000 question

A total of 200 rods have been manufactured. You sample 50 of the rods and find that they have a mean length of 15.5 inches with a standard deviation of 1.73 inches. Find the 80 % confidence limit for the mean length for all of the rods.

pls show work Exercises Within Reach Solutions in English & Spanish and tutorial videos at CollegePrepAlgebra.com the area Dividing Rational Expressions In Exercises 31-38, divide and simplify. X 3 (N - IN ) S( S + X) 31. 32. x + 2 . x - 2 x +2 x+1 2x 3 3x m 2x x2 512 t 33. x2 : 35. 4 34. m2 18 5 15 36. 24 30 4x x2 + 2x 5x + 5 x2 - 3x 37. 38. 3x -
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e. On a single roll of two number cubes , are rolling a sum of 6 and rolling doubles mutually exclusive events? f. On a single roll of two number cubes, what is the probability of rolling doubles given that the sum is 6? Hint: Use P(A| B): Pmpfg? 5)_ 9. On a single roll of two number cubes, are rolling a sum of 6 and rolling doubles independent
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Please show how each was done with workings , all questions under home work exercises Z = - X - Hx ox/ 0.84 = X - 1.5 in table, the closest we can get to 0.8000 is 0.7995 = P(Z
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The Chartered Financial Analyst (CFA) designation is fast becoming a requirement for serious investment professionals. Although it requires a successful completion of three levels of grueling exams, it also entails promising careers with lucrative salaries. A student of finance is curious about the average salary of a CFA charterholder. He takes a

Jenna's boss has control over how much she gets paid and how many shift hours she is given each week. Which type of power is best represents this description? Jenna's boss has control over how much she gets paid and how many shift hours she is given each week. Which type of power is best represents this description? Reward power. Expert power.

A database contains information on the wait times patients have reported in the emergency room to see a physician since the hospital opened 5 years ago. Suppose the wait times vary according to a normal distribution with mean wait time of 1.9 hours and a standard deviation of 0.7 hours. Based on a simple random sample of 23 patients at the

Inverting intervals, Wilson interval, Jeffreys interval Assume that X follows a Binom (n, p) distribution with the parameters n known and p unknown. I want a 100(1 - ? ? ? ) % confidence interval for p. The standard textbook interval is the large-sample interval ? C I s ? = p ^ ? z 2 ? ? ? ? S E ^ ( p ^ ? ) ? , where ? p ^ ? = n X ? ? is the
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Benford's Law is a probability rule frequently used by accounting auditors to detect systematic fraud. It states that approximately 12.8% of numbers will begin with the number 2.An auditor decides to investigate a particular firm further if a sample proportion of their invoices, with the invoiced number beginning with a 2, is in the highest 0.5%
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You are planting 200 flats of 6-packs and 350 4-inch pots in the greenhouse. Each flat holds six 6-packs or 10 4-inch pots. A 60 quart (2 cu. ft.) bag of potting mix will fill 23 flats of 6 packs or 112 individual 4-inch pots. How many total cubic feet of potting soil will you need

The flow of blood in a blood vessel is faster toward the center of the vessel and slower toward the outside. The speed of the bloodV, in millimeters per second(mm/sec), is given by the followingformula, where R is the radius of the bloodvessel, r is the distance of the blood from the center of thevessel, andp, L, and v are physical constants

The claim is that the white blood cell counts of adult females are normallydistributed, with a standard deviation equal to 2.19. A random sample of 35 adult females has white blood cell counts with a mean of 8.93 and a standard deviation of 2.33. Find the value of the test statistic. The test statistic is ?

Using the continuity of sin(t), the values of sin(" ) for integer k, and the identity Vt e R, sin(t)~ + cos(t)2 = 1. Prove that for any point (@, y) on the unit circle centred around (0, 0) (i.e. satisfying the equation o' +y' = 1), It e R s.t. (cos(t), sin(t)) = (x, y)
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Question 4 (1 point) Identify the type of sampling used in the following scenario: To get reactions about a new type of article, readers of a car magazine were asked to mail in their answers to a survey. Simple Random Stratified Convenience Voluntary Response
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Calc Problem 1 Given figure 1 to be the graph of the function f(r) with three points labeled and two sets of blank axis. The domain and range of f(r) is R and [-4, co), respectively. (a) Let g(x) = 2f(-2x - 4) + 1. Draw the graph of g(r). Make sure to clearly label where the three labeled points on the graph of f(x) are translated to on g(r). (b)
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please provide detailed and typed solution (if possible please do in ms word and share file link ) I will guarantee i will do helpful ? \f
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Select one student . Event A: "selecting a student who got an A on the final exam" Event B: "selecting a student who passed the final exam" Classify these events as: Not complementary Complementary Cannot be determined. None of these answers.

please show work 2. A random sample of size 10 is taken from a Gaussian population with mean , and variance 02 = 225 yield an average X1 = 170.2. An independent sample of size 12, taken from a Gaussian population with mean /2 and variance o = 256 yield an average X2 = 176.7. Find the 95% confidence interval for M1 - H2
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1. Bayes Network. Incidences of diseases A and B (D A, D B) depend on the exposure (E). Disease A is additionally inuenced by risk factors (R). Both diseases lead to symptoms (S). Results of the test for disease A (TA) are affected also by disease B. Positive test will be denoted as TA = 1, negative as TA = O. The Bayes Network is shown in Figure
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Consider a student loan of $15,000 at a fixed APR of 12% for 15 years. a. Calculate the monthly payment. b. Determine the total amount paid over the term of the loan. c. Of the total amountpaid, what percentage is paid toward the principal and what percentage is paid for interest. I do not understand how to use the formula.

Research a real-world application of statistics. In this application be sure to include one of the central tendencies such as mean, median, mode, or range. Be sure to thoroughly describe the situation and the importance of statistics in it. Cite your sources.

Hi My name is Sarah And I am working on lesson 22 in the spss book by samuel green and neil j, salkind the 7th edition. I am stuck on number 5 and 6 . For number 5 I don't know how to find the test value and for number 6 i don't know how to create a histogram thank you

1. At an alpha level of .01, test the null hypothesis against the alternative that the mean weight of this sample is no different from the average population weight (). ( 5 points ) Step 1: Ho: u _ ____ Ha : u _ ____ Step 2: Alpha level = ______ Step 3: Sampling distribution is ____________________ Step 4: Decision RuleI will reject the Ho if the

Consider the figure below, the decile-wise lift chart for the transaction data model, applied to new data. a) Interpret the meaning of the first and second bars from the left. b) Explain how you might use this information in practice. (Real-world examples welcome) c) Another colleague comments that you could improve the accuracy of the model by

Forty fast-food restaurant hourly employees were surveyed to see how many hours they worked per week, on average. The following data was obtained: 26, 27, 17, 24, 19, 26, 22, 27, 28, 26, 31, 15, 31, 24, 7, 21, 23, 21, 21, 18, 22, 23, 17, 33, 25, 30, 32, 32, 15, 5, 27, 12, 26, 37, 27, 23, 37, 34, 26, 26 Assuming the population standard deviation

Two six-sided dice are rolled (one red and one green). Some possibilities are (Red=1,Green=5) or (Red=2,Green=2) etc. (a) How many total possibilities are there? For the rest of the questions, we will assume that the dice are fair and that all of the possibilities in (a) are equally likely. (b) What is the probability that the sum on the two dice

hey i need help with this please include units 2. [010.5 Points] DETAILS PREVIOUS ANSWERS The potential across a capacitor is given by V(t) = 12 12'2'1-13t where V is measured in volts and t is time in seconds. when is the potential changing at 4 volts per second? Be accurate to 2 decimal places. Include units. 6.73 seconds x The potential across
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3. It has been recorded that hydro bills in Niagara are normally distributed with a standard deviation of $5.43. A survey of 60 homes showed that the mean amount spent on hydro per month was $96.15. Construct a 94% confidence interval for the population mean amount spent on hydro
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Put together a hypothetical business problem (can be anything even a real world problem or completely made up) with a hypothetical set of data that have x and y variables (also can be anything - a real world problem or made up data) put into an excel sheet to produce a graph with a linear regression equation and a confidence interval.

A bank gets an average of 15 customers per hour. Assume the variable follows a Poisson distribution. Find the probability that there will be 11or more customers at this bank in one hour. (That is, find P(X 11) (round to 4 decimal places) Answer:

content area top Part 1 Make the indicated trigonometric substitution in the given algebraic expression and simplify. Assume 0 less than theta less than StartFraction pi Over 2 EndFraction . StartFraction x Over StartRoot x squared plus 5 EndRoot EndFraction , xequals StartRoot 5 EndRoot cotangent theta

A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater than that of its leading competitor. A sample of 12 12 phones from the manufacturer had a mean range of 1170 1170 feet with a standard deviation of 33 33 feet. A sample of 17 17 similar phones from its competitor had a mean range of 1150 1150 feet

The exponential model Upper A equals 250.7 e Superscript 0.023 tA=250.7 e 0.023t describes the population, A, of a country in millions, t years after 2003. Use the model to determine the population of the country in 2003. Question content area bottom Part 1 The population of the country in 2003 was enter your response here million.

4) Are America's top chief executive officers (CEOs) really worth all that money? One way to answer this question is to look at row B , the annual company percentage increase in revenue, versus row A , the CEO's annual percentage salary increase in that same company. Suppose that a random sample of companies yielded the following data: B : Percent

Millennial Media Outlet is a media source that was originally developed for recent college graduates who are now in their professional careers. Subscriptions have been fairly successful, but now the publisher wants to explore their advertising base. Advertisers always need to know about demographics and information about subscribers, so the

Please help/explain 3. If a rock is thrown upward on the planet Mars with a velocity of 10 m/'s, its height (in meters) after t seconds is given by H = 10t - 1.86t2 a) Find the velocity of the rock after 1 second b) Find the velocity of the rock when t = a c) When will the rock hit the surface of the planet? d) With what velocity will the rock hit
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Please solve and show steps: 2. Here is another problem that addresses a military problem. The Joint Staff is evaluating several force structure alternatives using a combat simulation model. They are interested in the ability of the force to ght and win in a large scale combat operation. The measures that they have decided to use (and that will be
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Use R studio please The percentage of hardwood concentration in row pulp (Factor A), the vat pressure (Factor B), and the cooking time of the pulp (Factor C) are being investigated for their effects on the strength of paper. Two levels of hardwood concentration, two levels of pressure, and two cooking times are selected. A factorial experiment
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Please help solve this. Thanks Question Help The waiting times between a subway departure schedule and the arrival of a passenger are uniformly distributed between 0 and 8 minutes. Find the probability that a randomly selected passenger has a waiting time greater than 3.25 minutes. Find the probability that a randomly selected passenger has a
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A ladder 5 m long is leaning against a vertical wall. If a person pulls the bottom of the ladder away from the wall at a rate of 0.5 m/s, how fast is the top sliding down the wall when the bottom of the ladder is 3 m from the wall?

29 1 2 3 The function graphed above is: Increasing on the interval(s) Decreasing on the interval(s)
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For any work on your calculator (aside from addition, subtraction, multiplication, or division), clearly indicate what you entered. 1. A manufacturing firm needs to purchase ball bearings. These ball bearings come in packs of 50 for $28 dollars and packs of 25 for $15. Determine the maximum number of ball bearings that can be purchased for $600 or

Suppose a simple random sample of size n = 1000 is obtained from a population whose size is N= 1,500,000 and whose population proportion with a specified characteristic is p=0.25 . What is the probability of obtaining x= 280 or more individuals with thecharacteristic? P(x 280) =_____ (Round to four decimal places asneeded.)

Write an equation for the polynomial graphed below. You can leave the function in factored form. 5+ 3 -5 -4 -3 2 -1 4 Q y ( x) =
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I need help with my homework. need explanation and answer ASAP. According to the Centers for Disease Control and Prevention (CDC), only 22.9% of American adults between the age of 18 and 64 met the 2008 guidelines for both aerobic and muscle-strengthening exercises between 2010 and 2015. Suppose a simple random sample of 200 American adults were
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1. In December 1995, 101-year-old Anne Scheiber died and left $22 million to Yeshiva University. This fortune was accumulated through shrewd and patient investment of a $5000 nest egg over the course of 50 years. In turning $5000 into $22 million, what were Scheiber's total and annual returns? How did her annual returns compare to the average of

Among the 365 US men, 151 (41%) were MexicanAmerican, 101 (28%) were nonHispanic white, and 113 (31%) were nonHispanic black. In both young US and Chinese men, E2 concentrations peaked at 25-29 years of age, at 43.3 (95% CI 41.9-44.8) pg/ml in US men and 29.0 (95% CI 26.2-32.0) pg/ml in Chinese men. Give an interpretation of that condence

A pediatrician measured the heights of 20 randomly selected 6-year old girls. The average height for these 6-year olds is (x bar) x = 44.85 inches with a standard deviation s = 3.39 inches. Assume that the distribution of heights of all 6-years old is approximately normally distributed. Find the 90% confidence interval for the population mean of

What can the Pearson's r tell us? Causality Direction Covariance Significance

MATH 2500: TAKE HOME 03 (30 points.) NAME: DUE: Wednesday, June 10th by 8 AM. DIRECTIONS: To receive full credit, make sure your work is neat and complete. 1. Find and simplify the indicated derivative using derivative properties: (a) \u0003 d \u0002 3 2x 5x + 1 dx (b) For F (x) = (c) For y = x sin(2x), find F 0 (x). 3x + 5 , find y 0 . 7 2x
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Here's the question 1. Derive the autocovariance functions for (a) AR(2) process; (b) MA(2) process and (c) ARMA(2,1) process. 2. (1) Verify whether the following process is stationary or not. If so, cal- culate its autocovariance. (2) Verify whether the following process is Ergodic or not. yt = (1 + 2.4L + 0.812) Et Et ~ WN(0, 1) 3. Consider the
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MAT-151-0500 reply to English and metric units of area is for science and math. Scientists and engineers all over the world need to share their work, and they often use different measurement systems. By converting measurements, they can compare and understand each other's findings better. This helps everyone work together more effectively and

For each set of numbers, find the mean, median and mode. Round to nearest tenth. 3 marks each 1. 45, 37, 28, 46, 51 2. 4.9, 7.1, 6.8, 4.9, 5.3, 6.8 3. A GPA is a weighted grade average. It is the total points earned divided by the total credit hours for the courses a student has completed.The total points per course is calculated as points per

If P ( A ) = .62, P ( B ) = .47, and P ( A B ) = .88; then P ( A B ) =

need help solving the problem An economist studied a large data set of Mexican consumer prices covering episodes of both high and low inflation. One of the goods in the study was coffee. When the inflation rate was low, an average of 3.4 changes in the price of coffee occurred each year. When the inflation rate was high, the price of coffee
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Hello, I am having problems finding the answer to this question. Thank you in advance for your help! A random sample of 16 pharmacy customers showed the waiting times below (in minutes). 5 15 18 11 22 23 16 25 23 points 18 17 20 21 14 19 20 24 Skipped Click here for the Excel Data File Find a 90 percent confidence interval for /, assuming that the
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The gestation time for humans has a mean of 266 days and a standard deviation of 25 days. If 100 women are randomly selected, find the probability that they have a mean pregnancy between 266 days and 268 days.

In October 2005, a company employs 10000 people and its total monthly wage bill is 15 million dollars. What is the average monthly wage of the company's employees? Average monthly wage? The company is growing at a rate of 12 employees per month. The total monthly wage bill is increasing at a rate of 230 thousand dollars per month. At what rate is

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For the following Hypothesis Tests below : (a) State the null hypothesis, if not given. (b) State the decision rule. (c) Compute the value of the test statistic. (d) Is H0 accepted or rejected? (e) Conclusion. Exercise 6: A stockholder at Critical Securities reported that the mean rate of return on a sample of 10 oil stocks was 12.6 percent with a

3. Evaluate each of the following integrals, using a trigonometric substitution . Do not forget the back substitution. Solving using other methods is not acceptable. integral x/sqrrt(sqr(x)-4) dx

A humane society claim that more than 35% of U.S households own a cat. In a random sample of 300 U.S households, 123 say they own a cat. At a=0.05

Determine whether the statement is true or false. If the statement is false, rewrite it as a true statement.If a 95% confidence interval for population mean is 1.7 < u < 2.3, then the probability is 0.95 that the mean is between 1.7 and 2.3. A: This statement is false because there is no probability attached once a confidence interval is

Suppose l x C Suppose 1 x C Virginia Co x M Inbox (1,20 x Connect " ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=08launchUrl=https cutthe O Maps M Grul @ Log In | Federal Stu. Theanswerhub.com.. Q Lumen OHM - MTH.. hapter 3 GRADED Homework i THELAME 7 Table 3.3 gives spending data for the football programs at the 10
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Precalulus 1. Let x] = 3:"1 n E N. For the following questions, you may need to consider cases for different values of n. (a) What's the domain of f? (in) What's the range of f? (c) Determine the :r- and yinteroepts, if they exist. (d) Does the graph of I have any symmetry? If so, describe or name the type of symmetry, and justify algebraically
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Suppose the demand D has p.m.f. P{D = 12} = 3/6, P{D = 18} = 2/6, and P{D = 24} = 1/6. (a) Compute the expected demand. (b) Compute the variance of D. (c) What is the expected number of lost sales if there were 16 items initially in stock? (30 points) Suppose the demand D has p.m.f. P{D = 12} = 3/6, P{D = 18} = 2/6, and P{D = 24) = 1/6. (a)
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Identifying the best splits involves determining how to reduce the amount of impurities after the split. This can be done by minimizing or maximizing the amount of entropy, the value of the Gini Index, or the misclassification error. That is, when these values are minimized or maximized that corresponds to the most pure states. a. True b. False

According to the National Center for Health Statistics there is roughly an 80% chance that a person of age 20 will still be alive at age 65. Suppose that 6 people of age 20 are randomly selected. What is the probability that AT MOST 3 are alive at age 65? use the binomPdf or binomcdf function (round answer to 4 decimal places)

only anser Deliverable#1 - Google x @ Assignment #2 (PartB) - x Take a Test - Md Rasher X C Get Homework Help W X Course Hero * *Course Hero X + X + -> C A mathxl.com/Student/PlayerTest.aspx?testld=216318812 Math 185 004 Md Rashedul Islam & | 07/24/20 8:27 PM Quiz: Quiz 6 (10.5 and 11.1) Time Remaining: 00:54:29 Submit Quiz This Question: 1 pt 17
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What proportion of police departments had response time of 5 minutes? How many police departments had response time of 5 minutes or less? What proportion of police departments had response time of 5 minutes or more? What percentage of police departments had response time of 8 minutes or more? How many police departments had response time of 7

Use implicit dierentiation to calculate the following quantities. (a) Find y'(x) from y cosx = x^2 + y^2 (b) Find y'(x) from tan(x/y) = x + y (c) Find y''(x) from x +y = 1 (d) Find y'''(1) from x^2 + xy + y^3 = 1

how to show my answer using fraction tiles or number lines Name Independent Practice Homewon Compare. Use >,
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Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

Assume that a simple random sample has been selected and test the given claim. Use theP-value method for testing hypotheses. Identify the null and alternativehypotheses, teststatistic, P-value, and state the final conclusion that addresses the original claim. The ages of actresses when they won an acting award is summarized by the statistics n=85,

The critical values for z-scores is 1.96 (pos. or neg.). The critical values for t-tests are typically approximately 2.00 as well. Explain why?

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.6 years, and standard deviation of 0.5 years. If 9 items are picked at random, 6%of the time their mean life will be less than how years?

The Olympics are held every 4 years. in 2016,the XXXI Olympiad will be held in Rio de Janeiro Brazil. a) Determine the year of the first Olympiad. ( you may need to review interpreting Roman numerals.) b) Show how you could determine whether 1966 was an Olympic year.

Use R to find the eigen-values of the following matrices a. [ 1 -2 2 3 ]; b. [ 2 2 2 4 ]

Calculus these question Use the information about each of the following samples to compute the confidence interval to estimate p. a. n = 46 and p = 0.48; compute a 90% confidence interval. b. n = 298 and p = 0.83; compute a 95% confidence interval. c. n = 1,140 and p = 0.58; compute a 90% confidence interval. d. n = 96 and p = 0.36; compute a 88%
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