A survey of 137 UNLV students during the fall semester revealed that 91 had Facebook accounts 73 had Instagram accounts 50 had Twitter accounts 26 had both Facebook & Twitter accounts 36 had both Instagram & Twitter accounts 44 had both Facebook & Instagram accounts 21 had all three social media accounts 8 did not have any of these social media accounts

Q: random vanable x is normally distributed P(x<86) P(x<86)= (Round to four decimal places as needed.)…

A: X~N( μ , ?)μ=90     , ?=4Z-score =( x - μ )/?

Q: Card Mom their own deck. Compute the probabi a. Bert and Ernie both draw an Ace. 1/169 b. Bert draws…

A: We know thatThere are 52 cards in the deck divided into two colour i.e red (26) and black (26).…

Q: Joint and Conditional Probability: In a box of 20 fruits, there are 8 apples and 12 oranges. 4…

A: No.of red apples=4No.of green apples=4No.of oranges=12Total no.of fruits=20

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

A: 3) According to the given information,Mean number of traffic accidents in a city during one hour of…

Q: Answer: 16. If P(H) = 0.5, P(HUJ)=0.8, P(HJ) = 0.3, what is P(J)?

A: P(H) = 0.5

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

A:

Q: a) Determine the value of the normalizing constant c b) Find the MGF of the distribution of Y c)…

A:

Q: The undergraduate grade point averages (UGPA) of students taking an admissions test in a recent year…

A: μ=3.28,σ=0.18

Q: Question 1 A & out of n system is one in which there is a group of n components, and the system will…

A: Since you have posted a question with multiple subparts, we will provide solution to the first three…

Q: You are locked in a dungeon. By the door are three boxes: one black, one white and one red. The…

A: Given statements on the boxes are:Black Box: "The key is not in the white box."White Box: "The key…

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: How many three-letter code words can be constructed from the first twelve letters of the Greek…

A: It is given that Total number of letters = 12Number of letters to be chosen = 3

Q: What is the probability that a randomly chosen flashlight lasts more than 100 hours? R. 0.41 b)…

A: One boat contains 3 different types of disposable flashlights.The probability that a type 1…

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: How many elements does it contain?  I forgot to add that part.

A: From the above part we haven(C) = n(B) ={ (1,4),(4,1),(2,3),(3,2) }n(CB) = { (2,3),(3,2) }

Q: Imagine you have a bag containing 5 red, 3 blue and 2 orange chips. If drawing without replacement,…

A: Given,Number of red chips, n(red) = 5Number of blue chips, n(blue) = 3Number of orange chips,…

Q: Once an individual has been infected with a certain disease, let X represent the time (days) that…

A: The pdf of the Weibull distribution is,The values of the parameter are ,  and .

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: Apple juice contains trace amounts of arsenic, measured in parts per billion (ppb). Over the past…

A: YearConcentration20191.4920223.0520202.5320212.3720193.4920192.6220232.820233.6920203.0420221.622021…

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

A: X~N( μ , ?)μ=22    , ?=1.22    ,n=67Z-score =( x - μ )/?

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: probability that all six numbers appear?

A: Here eight distinct dice are rolled.Finite number of dice are rolled.Each die's outcome is…

Q: Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual…

A: From the provided information,

Q: Find the z-score that has 70.5% of the distribution's area to its right. he z-score is Round to two…

A: X~N(0,1)X follow with mean zero and standard deviations is 1

Q: Help please: Flip a fair coin 3 times. Let X be the number of Heads. Then flip the same coin X…

A: (a) Find the joint PMF (Probability Mass Function):First, let's find the possible values of X and…

Q: For mated pairs of gallinules (type of water bird), let X equal the weight in grams of the male and…

A: It is given that X denotes the weight of the male and Y denotes the weight of the female.X and Y…

Q: A bag contains 50 red marbles, 20 white marbles, and 30 black marbles. If you select a handful of…

A: There is total 50 red marbles, 20 white marbles, and 30 black marbles.

Q: .62 (b) What is the standard deviation of the sample proportion of the algae that were…

A:

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

Q: Of the emails you receive 20% are spam on average. Your spam filter is able to detect 90% of them…

A: P(Spam)=0.20P(not a spam)=1-0.20=0.80P(Detected | Spam)=0.90P(Detected | not a spam)=0.15

Q: Random samples of students at 107 four-year colleges were interviewed several times since 1998. Of…

A:

Q: [Q4] Determine the following probabilities for the standard normal random variable Z: (a) P(Z 1.45)

A: Z be a standard normal random variable with mean μ = 0 and standard deviation σ = 1

Q: probability tree diagram below, the numbers represent positions where certain pro 7. 10. given the…

A:

Q: The amount of time a nurse at the blood donor clinic spends with a patient is known to follow an…

A: The average amount of time spends with a patient is 10 minutes.A random variable XExponential(=)The…

Q: Suppose that you 2 two dice and observe the numbers showing on the uppermost surfaces of the dice.…

A:

Q: d) Find the probability that at least two particles arrive in a particular 4 second period.

A: An average of 27 particles per minute occurs. The arrival of particles at the counter follows a…

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 population mean and standard deviation are given below. Find the required probability and…

A: sample size(n)=75Mean()=223standard deviation()=5.9

Q: Hint: Use the Central Limit Theorem ]. Flip a balanced coin 5000 times. Let X be the total number…

A: n=5000P=0.5

Q: When drilling for raw materials of copper and nickel, the amount of copper obtained per cubic metre…

A: mean of C = 460 standard deviation of C= 140mean of N = 180standard deviation of N= 30and…

Q: The table below shows the number of state-registered automatic weapons and the murder rate for…

A: Regression equationY=0.86x+3.93

Q: 5 different colored flags will be placed on a​ pole, one beneath another. The arrangement of the…

A: 5 different colored flagsWe need to select 5 flags from 5

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 following data represent the number of times students at a certain university read the newspaper…

A: The formula for two sample t-test confidence interval is,

Q: a) What is the expected value of a puzer b) One customer has two chances to receive a prize. If the…

A: A real estate developer is awarding one of four prizes to customers who view new properties. The…

Q: Calculate the probability that the gold component is neither sufficiently pure nor sufficiently…

A: The quality of a manufactured gold component is assessed for both its purity and its…

Q: ALGEBRA 53 12 14 16 5 ENGLISH 10 HISTORY 24 a) What is the probability that a student is taking…

A:

Q: 5) The width of bolts of fabric is normally distributed with mean 950 mm and standard deviation 10…

A: Mean() = 950 mmStandard deviation() = 10

Q: Consider the unit cirlce in the plane; that is, the set of all points within a distance of 1 of the…

A: To find the probability density function (pdf) for the distance B=X2+Y2 from the origin to a point…

Q: If my list price is $425 less a 42% trade discount and I order 500 dozen sets of bowls, how much…

A: Given information:List price: $425Trade discount: 42%Number of dozen sets of bowls ordered: 500…