The average time it takes a salesperson to finish a sale on the phone is 9 minutes and is exponentially distributed. Find the probability that more than 2 minutes pass before a sale is completed.

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A: How students studyMorningBetween classEveningTotalStudy in grp49720Study in alone96722Total13151442

Q: the expected number of aces in your right hand is 2.

A: standard deck of cards. Each card in such a deck has a rank and a suit.The 13 ranks, ordered from…

Q: discuss probability or non-probability sampling, sampling method and sample size.

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Q: 9 When coin 1 is flipped, it lands on heads with probability when coin 2 is flipped it lands on…

A: The probability of coin 1 landing on heads is,  (i.e. 0.9).The probability of coin 2 landing on…

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A: The population mean is 54 and the population standard deviation is 8.

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A: Standard deviations=σ=0.5,α=0.05,marginoferror=e=0.15

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A:

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: The mean was 21.5 and the standard deviation was 5.6.

Q: 6. Ten cards are dealt from a standard deck. (a) What is the expected number of queens? (b) What is…

A:

Q: Based on an analysis of sample data, an article proposed the pdf f(x) = 0.65e-0.65(x - 1) when x ≥ 1…

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Q: Let X1 ∼ N(0.7,1.4), X2 ∼ N(−0.5,1.2), X3 ∼ N(0.9,1.7), and X4 ∼ N(−0.2,2.1), independently. 1.…

A: X1 ∼ N(0.7,1.4), X2 ∼ N(−0.5,1.2), X3 ∼ N(0.9,1.7), and X4 ∼ N(−0.2,2.1), independently.

Q: (a) Suppose two captains flip frisbees. Assume the probability that a frisbee lands convex side up…

A: (a)Suppose two captains flip frisbees. Assume the probability that a frisbee lands convex side up is…

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A: Z has follows standard normal distribution with mean zero and standard deviation one.

Q: Ages of Homes Whiting, Indiana, leads the “Top 100 Cities with the Oldest Houses” list with the…

A: WhitingMean age = 62.1 yearsStandard deviation = 5.4 yearsn1 = 20FranklinMean age = 55.6…

Q: To determine customer opinion of their service, Business Depot randomly selects 60 stores during a…

A: It is needed to define the sampling method.

Q: In a lottery where 50,000 tickets are sold (of which only one is winning) at $5 each, find the…

A: In this case, there is a 1 in 50,000 chance of winning the $100,000 prize. So, the probability of…

Q: Choosing officers: A committee consists of twelve women and eleven men. Five committee members will…

A: Committee consists  : 12 women and 11 men Total = 12 + 11 = 23 membersFive committee members will be…

Q: In each case, determine the value of the constant c that makes the probability statement correct.…

A: Mean=0Standard deviation=1

Q: A A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: The mean was 1537 and the standard deviation was 317.

Q: Let the probability distribution of random variable X be P(X= k) k! , k = 0, 1, 2, I then EX2 - ()

A: Let X has a pmf

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Q: Let p = 1. In this case, Sn as defined by n Sn = a + X₂ i=1 is the simple symmetric random walk.…

A: Given and a=0, we have:For a simple symmetric random walk, each Xi can be  with probabilit  .…

Q: Let the sample space S be the triangle with corners (0,0), (1,0), (0,1) with a uniform probability…

A: Note: “Since you have posted a question with multiple sub parts, we will provide the solution only…

Q: Given are five observations collected in a regression study on two variables. X; Yi 6 13 20 9 19 7…

A: Given is a data on x and y. We need to predict y from x using regression analysis..I used R software…

Q: The equation below estimates the effect of race on the probability of mortgage denial, holding…

A: Given that,      Pr(deny=1|P/I ratio, black)=(-2.29 + 2.78 P/I ratio+ 0.71 black)where,      is the…

Q: The quality of a metal is assessed for its purity and conductivity before it is shipped. The…

A: The probability that the metal is pure enough to be shipped is 90%. The probability that the metal…

Q: 7. A light sensor uses a photodetector whose output is modeled as a Poisson random variable X, with…

A: The provided information is as follows:The ..The sensor triggers the alarm if .

Q: Help: Suppose X ∼ Unif(a, b). Find Var(X).

A: Suppose X ∼ Unif(a, b).

Q: Find the indicated area under the standard normal curve. To the left of z = -1.36 and to the right…

A: Z be the standard normal distribution P(Z&lt;-1.36 or Z&gt;1.36)=?

Q: (d) (e) Using the marginal density of Y from (b), find the probability that the walk-up window is in…

A: Let X and Y have joint pdf

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Q: (a) Compute the cdf of Y. 0 F(y) 1₂² 24 2 1 Graph the cdf of Y. F(y) 1.0 36 y 12 F(y) 1.0

A: Given,the pdf of  as follow,(a)lets find out the cdf of  is,Hence the cdf of  islets we use the…

Q: Let X₁, X₂,... be independent random variables, each taking a value of either 1 (with probability p)…

A: Given:Let  be independent random variables, each taking a value of either 1 (with probability p) or…

Q: for part 2) why are the limits on the integral 10 as the lower bound and 20 as the upper bound? does…

A: The probability density function of t is f(t)=.     for 10&lt;t&lt;200.                  OtherwiseWe…

Q: A coin is tossed 17 times. In how many outcomes do exactly 11 heads occur?

A: A coin is tossed 17 times i.e., .The objective is to find the number of outcomes in which exactly 11…

Q: Door prizes for entrants in a young inventors competition are $100, $50, $25 and $10. In how many…

A: Door prizes for entrants in a young inventors competition are $100, $50, $25 and $10.

Q: In a classroom there are 28 tablets which includes 5 that are defective. If seven tablets are chosen…

A: No.of defective tablets=5No.of non defective tablets=23

Q: 5. Let (X, Y) have joint pdf f(x, y) = ½ on D = {(x, y) : x² + y² ≤ 1} and f(x, y) = 0 otherwise.…

A: Probability Density Function (PDF): Understand what a joint probability density function is. In this…

Q: Problem 3. On average there are four traffic accidents in a city during one hour of rush-hour…

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Q: Help to solve this. Thank you 7. A biased coin, P(H) = 0.3, is tossed until a head appears. (a)…

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A: Note:- "Since you have posted a question with multiple subparts we will provide solutions only to…

Q: Given f(x) = { (x2+1)/30; x = -2,-1,0,1,2  0; elsewhere ] Find the mean and variance of X.

A: X-2-1012f(x)

Q: a) The probability of a defective piece being produced in a manufacturing process is 0.01. calculate…

A: Probability of defective piece(p)=0.01Probability of non-defective piece(q)=1-p=1-0.01=0.99Note: You…

Q: Suppose that a random variable X has the following probability density function. SC(36-x²) 0≤ x ≤ 6…

A: From the provided information,

Q: Determine whether the given experiment results in a binomial distribution. If not, select the reason…

A: The objective is to determine whether the given procedure results in a binomial distribution.Given…

Q: Digitalis is a technology company that makes high-end computer processors. Their newest processor,…

A: The processor is to be sold for $3300, making a profit of $429.

Q: Y 1 x 0 2 3 0 0.04 0.09 0.10 0.12 1 0.07 0.11 0.08 0.04 0.15 0.10 0.05 0.05 2 (a) Compute E(X),…

A: Suppose the joint pmf of X and Y is

Q: Brandy is sorting through her many pairs of socks, and is counting how many of each color she has.…

A: The number of white pairs of socks is 48. The number of black pairs of socks is 52. The number of…

Q: A school with 525 employees needs new copier passcodes. Each passcode will have 3 digits chosen from…

A: A school with 525 employees needs new copier passcodes. Each passcode will have 3 digits chosen from…