If a stock market index goes up 70% of the time, what percent of the time does it go down?

Q: A JJU student can take between 1 and 6 courses per semester. Let X be the number of courses a…

A: Solution: Let X represent the number of course a randomly selected JJU students.

Q: C. Hail Mary Shot - A Hail Mary shot is a shot thrown from a place far away from the basket. Since…

A: From the given information, Based on Piel's records, 2 out of 500 hail Mary shots made by all…

Q: The premiere of Game of Thrones' seventh season set a series record of 10.1 million viewers tuning…

A: Introduction: Denote μd as the true mean difference in the number of viewers watching line, and the…

Q: Solve the linear programming problem by the simplex method. Maximize P = x + 4y - 2z subject to 3x +…

A:

Q: 7. Let X, and X₂ have the joint probability mass function (pmf) p(x₁, x₂) = X-X₂/36, x₁ = 1, 2, 3…

A: The following solution is provided below:

Q: A candy company developed a new consumer product that is expected to earn $1,000 in profit each year…

A: We have given the following data Expected profit when demand is Low =$1000Expected profit when…

Q: The mean of X is

A: It is given that  P( win ) = 65% = 0.65 Sample size, n = 20

Q: Problem #5 - Real Estate Shawn and Maddie purchase a foreclosed property for $50,000 and spend an…

A: It is given that Shawn and Maddie purchase a foreclosed property for $50,000 and spend an additional…

Q: Based on responses from 1,151 US residents, the survey reported a 95% confidence interval of 3.40 to…

A: It is given that  95% confidence interval = ( 3.40, 4.24 ) Total residents = 1151

Q: 1. A coin has been tossed 1000 times, 470 times of which it landed heads up, and 530 times it landed…

A:

Q: 2) A new quality assurance process developed in Limpopo by Mr Masela for a newly introduced Sephaku…

A: Given that  Mean = 5000 , Standard deviation = 120 , Sample Size = 50

Q: he number of chocolate chips in a chocolate chip cookie has a Poisson distribution with parameter λ…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: The PEW Research Institute recently conducted a survey of adult Americans regarding Internet…

A: It is given that 15% of the respondents made a retail purchase on the internet last week and 16…

Q: Hail Mary Shot - A Hail Mary shot is a shot thrown from a place far away from the basket. Since it…

A: Given: Hail mary shot: Piel witness that hail Mary shot is made 2 out 500 i.e probability of hail…

Q: A candidate vaccine intended to treat a bacterial disease is undergoing its first stage of clinical…

A:

Q: Hint: Let p = x+y 4.10. Let X be a binomial random variable with parameters n and p. Show that 1…

A: Given that

Q: In a 2015 study entitled How Undergraduate Students Use Credit Cards, it was reported that…

A: Introduction: Denote μ1, μ2 as the true population mean credit card balance for undergraduate…

Q: 7. DETAILS a. How many possible ways are there to select the 4 out of 20 packets (order does not…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: Suppose the null hypothesis, H0, is: a weightlifting bar can withstand weights of 800 pounds and…

A:

Q: lognormal with standard deviation of 9dB, the outage probability can be expressed as erfc(x)/2.…

A:

Q: Property 1: f(x) ≥ 0 for all x € [a, b]. [ºs Property 2: f(x) dx = 1 (2 Question 1 (1) Explain why…

A: a)Given, f(x)=2x  x∈[1,e]Here f(x)≥0 ,for all x∈[1,e]Now we will check Property 2P(1≤X≤e)=∫1e 2xdx…

Q: An actress has a probability of getting offered a job after a try-out of 0.11. She plans to keep…

A:

Q: Suppose that E and F are two events and that P(E and F) = 0.1 and P(E)= 0.4. What is P(FIE)?

A: Solution-: Given: P(E and F)=0.1, P(E)=0.4 We want to find P(F|E)=?

Q: a. What is the probability that the selected child is abused? b. What is the probability that the…

A: Define some events A : a child is abused. B : a child is non-abused. E : a child is classified as…

Q: If a random variable has the probability density f(x) = Find the probabilities that it will take on…

A: The given probability density function of X is,

Q: A 6-sided die is rolled. What is the probability of rolling a number less than 2? OA. 1 6 OB. 5 6 O…

A:

Q: Problem 2: Exercise 2.92 in the textbook, page 71. Suppose the diagram of an electrical system is as…

A: P(A) = 0.95 P(B) =0.7 P(C) = 0.8 P(D) = 0.9

Q: 9. A bag contains 50 pennies, 50 nickels, 50 dimes and 50 quarters. You reach in and grab 30 coins.…

A: Total, 50 pennies 50 nickels 50 dimes 50 quarters Grab 30 coins Possible outcomes= ?

Q: A normal random variable X is having mean 99 and standard deviation 5.78. What is p(X>78)?…

A: Answer: For the given data, For a random variable X, mean (μ) = 99 Standard deviation (σ) = 5.78

Q: **** There are different ways to select two objects at a time. (Type a whole number.) Explain why…

A: It is given that  Total objects = 8   Note: Combination formula: C(n,r) = nCr = n!/(n-r)!r!

Q: Consider the random experiment of rolling a pair of dice. Suppose that we are interested in the sum…

A:

Q: A random variable X has the following probability distribution: X P(X) Solve for P(X ≤ 4) 12 0.12 23…

A: Given probability distribution of random variable X is; X 1 2 3 4 5 6 P(X) 0.12 0.09 k 0.08…

Q: 23% Of hospital patients stay for less than one day. If 1334 patients in January stayed for less…

A: P(stay less than one day ) = p = 0.23   if n(stay less than one day) = 1334 No. of patients trated…

Q: Given events J and K: P(J) = 0.28; P(K) = 0.47;  P(J or K) = 0.65 Find P(J and K). Find the…

A: Given information- We have given two events J and K. P(J) = 0.28; P(K) = 0.47;  P(J or K) = 0.65 We…

Q: in a sample of n-16 selected from a normal population, X-52 and S-8, how many degrees of freedom…

A: given data H0 : μ = 50sample size, n = 16sample mean ( x¯) = 52sample S.D. (s) = 8find df = ?  for t…

Q: Q4. The probability density function of the RV X is f(x) = 5e-kx for x ≥ 0. Find 2) bslubado ni a)…

A:

Q: 1. Let X and Y have joint probability density function (pdf) given by [1,0<x₁, x₂ <1, 0, elsewhere.…

A:

Q: Suppose 260 randomly selected people are surveyed to determine whether or not they took a college…

A: given data  n = 260 x = 205 p^ = xn = 205260 = 0.7885construct 95% confidence interval for p.

Q: 5. Two fair dice are rolled. Let X be the maximum of the results of two dice. (a) Probability Mass…

A:

Q: A coin is tossed three times. An outcome is represented by a string of the sort HTT (meaning a head…

A: From the provided information, A coin is tossed three times. Total outcomes = 23 = 8

Q: If the moment-generating function of X is M(t) = {e¹ + find the mean, variance, and pmf of X. 2t

A:

Q: In a 2015 study entitled How Undergraduate Students Use Credit Cards, it was reported that…

A: Here we have to identify What type of t-test should be used here

Q: Mega Millions is a multi-state lottery played in most U.S. states.As of this writing, the top cash…

A: Given that, Mega Millions is a multi-state lottery played in most U.S. states. As of this writing,…

Q: 3.29 An important factor in solid missile fuel is the particle size distribution. Significant…

A:

Q: Marcy has two dogs. One of the dogs weigh twice as much as the other. If the total weight of the two…

A:

Q: Mr. Dela Cruz can take either two roads to the airport from his home (Road A or Road B). Owing to…

A: Given For Road A:-Mean(μ)=54standard deviation(σ)=5For Road B:-Mean(μ)=57standard deviation(σ)=10

Q: longley is a built-in R data.frame which is sometimes used in economics to study regression. We are…

A: Solution -Given that , The values of x are as follows x: 60.323, 61.122, 60.171, 61.187, 63.221,…

Q: Give the probability in a decimal form( correct to two decimal places).  Last semester,  a certain…

A: It is given that the total number of grades is 243.

Q: The chance that a randomly selected person in a population would have voted Conservative in the most…

A:

Q: A group of 20 university students contains 8 who are in their first year of study. A student is…

A: Given,Total no.of university students=20no.of universities who are in their first year of study=8