Group D 2. Be X a random variable with density function defined by: e-x/3 f(x) = x > 0. 3 Get the moment-generating function and, based on it, calculate the average and the variance of X. =

Q: 4. The number of students entering in the canteen at any given hour is represented by a random…

A:

Q: 13. Which of the following expressions represent D. 480 the number of possible ways choosing 3…

A: here as per policy I have calculated first main question  here use combination

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A: *Answer:

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A:

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A:

Q: a. A set of playing cards has King of hearts and Queen of spades missing. In order to play mentioned…

A:

Q: Use the following An internet job recruitment company, Companyl, claims on their website that their…

A: Let, Event G1 : Company 1 is successful in job offer Event G2 : Company 2 is successful in job offer

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A:

Q: Q10. The probability model for a random variable A is [% , a=-1 P₁(a)=% a=1 0, otherwise The…

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Q: TABLE 4.5 In a telephone survey of 1000 adults, respondents were asked their opinion about the cost…

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Q: The heights (in inches) of eight tomato plants are: 36, 45, 52, 40, 38, 41, 50, 48. What is the mode…

A: Given n=8

Q: 1. A 100-watt light bulb has an average brightness of 1640 lumens, with a standard deviation of 62…

A:

Q: If a person randomly picks and buys one of the four newsletters in the street each morning. What is…

A: Given that  A person randomly pics and buys one of the four news letters in the street each morning.…

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A: Given: 135 tickets - 10% discount  125 tickets.- 20% discount  60 tickets - 30% discount  30 tickets…

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Q: 2. A bank operates both a drive-up facility and a walk-up window. On a randomly selected day, let X…

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Q: For which sample size (n) and sample proportion (6) can a normal curve be used to approximate the…

A: Answer :- Find  for which sample size (n)  and sample proportion (P^)  can a normal…

Q: 4 (30%) Assume that Carbondale Co. expects to receive S$1 million in one year. The existing spot…

A:

Q: Consider the hypothesis test Ho: o = o2 against H₁: o <o2 respectively. Suppose that the sample…

A: The question has to be  solved  in Excel, so I will use Excel formulas and functions.

Q: The following table of probabilistic time estimates (in weeks) and activity predecessors are…

A: GivenThe table of probabilistic time estimates in weeks and activities predecessors as shown below

Q: The test contains four questions, and there are five different answers to each of them, of which…

A: As per bartleby guideline expert have to answer first question only since I have done both for you

Q: Q12. The median of a random variable X is any value a for which P(X ≤ a) ≥ 1/2 and P(X ≥ a) ≥ 1/2.…

A: X~exp(λ=3)

Q: 6. Assume that there are only three possible levels of education: "low", "middle" and "high". Among…

A: Note: Hey, since there are multiple questions posted, as per guidelines we will answer first…

Q: In three boxes are capacitors as shown in Table below. An experiment consists of first randomly…

A: Given:

Q: eu = for 0 < x. Determine The probability density function of the time you arrive at a terminal (in…

A: See the below solution

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A: Given that  Number of trials n=15 Success of probability p =0.5 X~binomial (n,p)

Q: Mr. Long is a librarian at Westside Library. In examining a random sample of the library's book…

A:

Q: Solve step by step in digital format (solve only part d) part a b and c…

A: A discrete random variable is a variable whose values can be obtained by counting. Its values can…

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A: For the given data, We have to calculate relative frequency histogram. Relative frequency =…

Q: Case Study #2 - Forecasting Ahmed is the Sales Manager at a large corporation that manufactures…

A: Note: As per guidelines we will solve the first question only, please repost other questions for…

Q: The average SAT score of students is 1110, with a standard deviation ≈ 120.   If a sample of n =…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: A license plate is to consist of 4 digits followed by 2  uppercase letters. Determine the number of…

A: Solution-: Given: A license plate is to consist of 4 digits followed by 2  uppercase letters. We…

Q: A population consists of the four numbers 3, 4, 5, 9 with mean = 5.25 and variance = 5.1875 possible…

A: 1 3 3 3 2 3 4 3.5 3 3 5 4 4 3 9 6 5 4 3 3.5 6 4 4 4 7 4 5 4.5 8 4 9 6.5 9 5 3 4 10…

Q: A sample of 389 people is selected. The people are classified according to place of residence…

A: The total number of people is 389.

Q: Find 1- Value of C. 2-Probability mass function describing the distribution of X. 3-Cumulative…

A: It is given that X be a discrete random variable with probability mass function is given in the…

Q: Let's Dig Activity 3: Find Me! Find the unknown in each item. 1. C (8,3)= 2. C (n,4)= 15 3. C (8,r)…

A: As per our guidelines we are supposed to answer only 3 sub-parts of any questions so i am solving…

Q: In 1994, the moose population in a park was measured to be 4420. By 1996, the population was…

A: The equation of the best fitted line passing through the points (x1, y1), (x2, y2) is (y – y1)/ (x –…

Q: b. An experiment wishes to investigate the effect of three variables- pressure, temperature, and the…

A:

Q: The local high school is hosting an ice cream social for new students. They record the ice cream…

A: Formula : P(A|B) = P(A and B)/P(B)

Q: (a) For each event in the table, check the outcome(s) that are contained in the event. Then, in the…

A: The provided information is  a. For event X  P(X)=5/8   For event not X P(not X)=3/8   b. subtract…

Q: b. Hydraulic landing assemblies coming from an aircraft rework facility are each inspected for…

A:

Q: Suppose that diameters of a new species of apple have a bell-shaped distribution with a mean of…

A: From the given information, the mean is 7.19 and the standard deviation is 0.38.

Q: According the the U.S. Census bureau, the percentage of Santa Ana residents living in poverty is…

A: Given P1^=0.177 P2^=0.133 n1=1200 n2=1500

Q: ourciany 1. It refers to a collection of objects from a set where order or arrangement of the chosen…

A: Since we only do up to three sub parts of a problem, we'll be doing the first three sub parts only.…

Q: Compute for the standard deviation X f 0 ≤ x ≤ 6 6 6 < x < 12 8 12 < x < 20 24 20<x< 30 7 30<x< 40 3

A:

Q: Determine the probability that the rolled dice will result to a a multiple of 3 or a square number

A: The all-possible outcomes of rolling a fair die are 1, 2, 3, 4, 5, and 6.

Q: (20 pts-10 pts each) Voters in a particular city who identify themselves with one or the other of…

A: The provided information is  Party A                                      Party B x1=90…

Q: Q3. During the inaugural season of a certain soccer league, the medical teams documented 256…

A: Solution-: We have given following table: Severity Practice (P) Game (G) Total Minor (A) 62 81…

Q: A roulette wheel with scores of 1 and 2 is turned twice. The probability of landing a score of 1…

A: