A student is writing a quiz with four t/f questions.  The student wants to know the theoretical probability of passing the quiz by guessing.  This means that 2 or more of the 4 questions are answered correctly by guessing.  Determine the probability.

Q: Help pls: Suppose X ∼ Exp(λ). Find Var(X).

A: X~Exp(λ)

Q: Let X and Y be independent random variables such that Var[X] = 4.8 and Var[Y ] = 9.7. How can we…

A: We have given thatVar[X] = 4.8Var[Y] = 9.7Let Z = 2X + 3Y

Q: 1. One hundred persons were asked, "Do you favour regional integration?". Of the 35 that answered…

A: It seems you have submitted 3 different questions, as per the guidelines I can solve the first one.…

Q: If p= 1.2% and n = 500, is the Poisson distribution a reasonable approximation of the binomial…

A: Given that p = 1.2% and n = 500,we are asked whether the Poisson distribution is a reasonable…

Q: The probability of having 3 boys out of 4 children is to be determined.  A simulation is conducted…

A: The provided information is as follows:The total number of children is .The experimental probability…

Q: Question 3 * We candomly select one ball from Containing 12 red and 10 blue balls. Find the…

A: Total balls = 12 + 10 = 22Red balls = 12, Blue balls = 10

Q: Question: Starting with a scrambled puzzle, if we proceed by randomly choosing moves, what is the…

A: Examine the following 3-square random procedure. The transition probability matrix and the state…

Q: In how many ways can a hand of 6 diamonds be chosen from an ordinary deck? A hand of 6 diamonds can…

A:

Q: Q 4.2. Let (X, Y) be a random variable with the following density: 15x²y 0 0 < x < y < 1, otherwise.…

A: Let X and Y have joint pdf

Q: c. Using Emily's sample results, construct a 90% confidence interval estimate of the proportion of…

A: The best point estimate of the therapists success rate is 0.481.

Q: General Electric models the time X in years that a new microwave will last using the following PDF…

A: We have given that the following pdff(x)=

Q: Let X1,...,Xn be a random sample from a distribution with mean μ and variance σ2. Find the value of…

A: Given X1, X2, ……, Xn be a random sample from a distribution with mean µ and variance σ2.

Q: 4. Suppose that X is a random variable taking just two possible values {a, b}, where P(X = a) = 1-p…

A: Given that X is a random variable having just two possible values (a, b), where P(X = a) = 1 - p and…

Q: Use the Standard Normal Table or technology to find the z-score that corresponds to the cumulative…

A: To find the  -score that corresponds to the cumulative area, we use the standard normal…

Q: estaurant in Ohio, the number of minutes that diners spend at the table has a major impact on the…

A: X~N( μ , ?)μ=89 , ?=17Z-score =( x - μ )/?

Q: The diameter of fiber optic cable wite harnesses supplying the telecommunications industry…

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

Q: the last bit of the solution is incorrect as this is not a standard exp r.v.

A:

Q: 2. A retailer for a petroleum product sells a random amount X each day. Suppose that X, measured in…

A: Given a retailer for a petroleum product sells a random amount X each day. Suppose that X, measured…

Q: Help please: Alice throws darts at a circular target of radius r and is equally likely to hit any…

A: Here given that Alice throws darts at a circular target of radius r and is equally likely to hit any…

Q: The graph of the waiting time (in seconds) at a red light is shown below on the left with its mean…

A: The graph shows the waiting time at the of the red light.Sample size Based on the graph on the left,…

Q: Use the normal distribution to the right to answer the questions. (a) What percent of the scores are…

A: X~N( μ , ?)μ=20.2    , ?=5.4Z-score =( x - μ )/?

Q: If the PDF of X is f(x)=2x/k2 for 0<x<k, for what value of k is the variance of X equal to 2?

A: The probability density function of Xf(x)=2x/k2      for 0&lt;x&lt;kfor what value of k the…

Q: A random sample of 5008 adults in a country includes 760 who do not use the Internet. Construct a…

A: n=5008x=760

Q: random variable X is given in the following table. Find the standard deviation of the random…

A: PMF of Xx-2-1012P(X =x)0.160.170.300.150.22

Q: A box contains 2 red balls, 2 blue balls and 1 green ball. We draw, simultaneously without…

A: A box contains:We draw balls simultaneously, without replacement from the box.

Q: Q 4.3. A fair die is rolled until a 6 is obtained. Let Y be the total number of rolls and X the…

A: 1. Compute the distribution of Y:When rolling a fair die until a 6 is obtained, Y follows a…

Q: Can you help please: Suppose that X ∼ Geom(p). In chapter 2, we computed the CDF of X as FX(x) = 1…

A:

Q: The mean percent of childhood asthma prevalence in 43 cities is 2.43%. A random sample of 34 of…

A:

Q: X~N(0,1) and find the probability density function of the random variable Y=IXI.

A: Probability Distributions: You should be familiar with probability distributions, including the…

Q: Suppose X₁, X2, and X3 are independent random variables where X₁~ N(μ₁ = 1,0²= 1²) X₂~ N(₂=2,0²2…

A: Hello! Since you have posted 3 different questions, we are answering the first question with three…

Q: Probability of event s1 = 0.21, probability of event s2 = 0.17, probability of event s3 = 0.39,…

A: Given thatP(s1)=0.21P(s2)=0.17P(s3)=0.39P(s4)=0.23Suppose that t = {s2 union s4}.

Q: Customer A and B are being served by two clerks in the post office. Customer C is waiting and he is…

A: Let's consider the possible scenarios:Customer A is served first and leaves last.Customer B is…

Q: Describe the difference between odds and probability. Give an example of each to support your answer…

A: Here we have to describe the difference between odds and probability. Give an example of each to…

Q: 1. Let X, Y be non-negative continuous random variables with probability density functions (pdf)…

A: X and Y are independent

Q: In a 1-pound bag of skittles the possible colors were red, green, yellow, orange, and purple. The…

A: We have to check the given table is Probability distribution table or not.

Q: Given the following fictitious data 40% of all undergraduates at XYZ University are from Florida and…

A: 40% of undergraduates are from Florida (F), and 60% are from out of state (O).22% of students are…

Q: and second components meet specifications are 0.96 and 0.89, respectively. Let X be the number of…

A: The random variable X defines the number of components in the assembly that meet specification.

Q: A​ single, six-sided die is rolled. Find the probability of rolling an odd number or a number less…

A: A single six sided die is rolled.Sample space S = {1, 2, 3, 4, 5, 6}Odd number or less than 4 = {1,…

Q: Use the sample data and confidence level given below to complete parts ( a ) through ( d ) . A…

A: sample size(n)=1003who said "yes"=574confidence level=99%

Q: A campus radio station surveyed 500 students to determine the types of music they like. The survey…

A: A campus radio station surveyed 500 students. 207 like rock, 163 like country, and 119 like jazz.…

Q: Which command will find the probability of making the first free throw on the fifth attempt when the…

A: According to the Bartleby guidelines experts solve only one question and rest can be reposted.

Q: What is the probability of drawing a spade from a deck of playing cards 6 or fewer times in 12…

A: There are 52 cards in standard deck of cards.4 suits in deck of cards , each suit have 13…

Q: ixty percent (60%) of Students of the Reginal College were took French. Fifteen (15) were randomly…

A:

Q: The posterior probability of the deadline being exceeded is:

A: As per policy I have calculated first main question plz REPOST for remaining questions. There is 0.3…

Q: The population mean and standard deviation are given below. Find the indicated probability and…

A:

Q: Use the standard normal table to find the z-score that corresponds to the given percentile. If the…

A: The z-score that corresponds to P78

Q: Find the indicated z-scores shown in the graph. Click to view page 1 of the table. Click to view…

A: The graph of the standard normal distribution is given.

Q: Let X denote the vibratory stress (psi) on a wind turbine blade at a particular wind speed in a wind…

A: Given the Rayleigh PDF:Let  be the vibratory stress on a wind turbine blade at a particular wind…

Q: P(z> -1.062) = (Round to four decimal places as needed.)

A: X~N( μ , ?)μ=0 , ?=1 For standard normal distribution.Z-score =( x - μ )/?

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…