Suppose that 4% of a population carries antibodies to a virus. For a research project, you need 40 people with antibodies to the virus. How many people should you test so that the expected number of people with the antibodies is 40? Round up to a whole number. Submit Question

Q: Assume the online test  has 15 multiple questions. Each question has five possible answers, of which…

A: Binomial distribution: The binomial distribution gives the probability of number of successes out of…

Q: d. If 100 SAT scores are randomly selected, find the probability that they have a mean between 1400…

A: d. Z-score: The z score formula is, z=x¯-μx¯σx¯ In the formula, μx¯ is the population mean, σx¯ is…

Q: Given that a random person just tested positive, determine the probability of having this illness.

A: Here use tree diagram

Q: An economics professional body estimates that 75% of the students taking undergraduate economics…

A: Solution: Let X be the random variable that students taking undergraduate economics courses are in…

Q: Suppose 42 % of the students in a university are baseball players. If a sample of 628 students is…

A:

Q: Among 70 exposed people. 15 developed disease and 55 remained healthy. What is the odds of illness…

A: Given: developed disease = 15remained healthy = 55Total exposed = 70

Q: Based on historical data, your manager believes that 26% of the company's orders come from…

A: Introduction:Here, the suggested population proportion, π = 26% = 0.26.The sample size, n = 112.The…

Q: Suppose 55 % of the population has a college degree. If a random sample of size 496 is selected,…

A: Where,

Q: A grocery store has determined that in crates of tomatoes, 95% carry no rotten tomatoes, 2% carry…

A: Given: The probability that crates carry no rotten tomatoes is 0.95. The probability that crates…

Q: Find the probability that an observation taken from a standardnormal population will be more than…

A: From the provided information, The observation is taken from a standard normal population. Mean for…

Q: In a factory that produces pieces of ready-made concrete, if the ratio of production of defective…

A:

Q: Suppose 57% of the population has a college degree. If a random sample of size 770 is selected,…

A: the pdf of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: A kissed frog has a 70% chance of turning into a prince, while a kissed toad has only a 20% chance…

A: A kissed frog has 70% chance of turning into a prince.

Q: A person buys a raffle ticket for $20. 500 tickets are sold. One winner is chosen and receives…

A:

Q: Suppose 56 % of the students in a university are baseball players. If a sample of 840 students is…

A: Given data, n=840p = 0.54q =1-p = 0.46p^ =0.51

Q: A three-bulbed flask contains five particles. What is the probability, to three significant figures,…

A: Let us assume X be the random variable representing the number of particles, out of total 5, in the…

Q: A hotel manager calculates that 12% of the hotel rooms are booked. If the manager is right, what…

A: From the given information,P be the probability that hotel rooms are booked = 0.12.Sample size (n)…

Q: You roll a fair six sided die thirty times. What is the expected number of times the die lands on 2?

A: Roll a fair six sided die thirty times.

Q: What is the probability that the sample proportion exceeds 0.12?

A: Let p be the proportion of throw away of what people buy at the grocery state. Given that p=13% =…

Q: A film distribution manager calculates that 7 % of the films released are flops. If the manager is…

A: Where.

Q: If 200 Honda Accords are randomly selected, approximately how many of them will have the braking…

A: Given data,μ=45σ=0.5

Q: of 90% with a sample

A: Given : Sample size = n = 19 Significance level, α =1- 0.9 = 0.1

Q: Suppose 45% of the doctors in a hospital are surgeons. If a sample of 844 doctors is selected,…

A: Solution: From the given information, the probability of the doctor in a hospital is a surgeon is…

Q: expected value

A: Let X be the random variable representing the number of policies sold by the salesperson. The…

Q: Find the expected value (for the participants) for lottery with 4000 sold tickets by price $50.00…

A: Given data is : 4000 ticket Price per ticket is $50.00 One winning ticket is $12000

Q: The probability that a group of students play Hockey or Soccer are shown below. S 20% 35% 18% 27%…

A:

Q: According to a 2009 Reader's Digest article, people throw away about 12% of what they buy at the…

A: Let X be the proportion of things throw away that people bought at the store. The population…

Q: A bag has three times as many green marbles as there are blue. If you take 8 marbles from this bag,…

A: In question,  Given that a bag has three times as many green marbles as there are blue marbles, 8…

Q: One thousand tickets are sold at $1 each for four prizes of $100, $50, $25, and $10. What is the…

A: Introduction: Denote the random variable X as the amount of win on purchasing one ticket, and p (x)…

Q: According to a 2009 Reader's Digest article, people throw away about 10% of what they buy at the…

A: Given information : Population proportion = p= 10% = 0.10 q = 1 - p    = 1 - 0.10 = 0.90 Sample size…

Q: For a team with 1318 turnovers in a season, find the expected number of wins in a season.

A: It is given that Regression equation of y on x is y = 102 - 0.05x

Q: A film distribution manager calculates that 9 % of the films released are flops. If the manager is…

A: Given Information: Manager calculates that  9% of the films released are flops i.e., p=0.09 Sample…

Q: Assuming that a family has two children, identify the expected number of boys per family. 1 A B 2 1

A:

Q: what is the predicted value for the return of GM given that the S&P500 return is 5% 2 The number of…

A: The regression equation is GM^=0.005860+0.904753S$P500.

Q: A film distribution manager calculates that 4% of the films released are flops.If the manager is…

A: The given data: Probability that the films released are flops, p = 0.04 Number of samples, n= 747…

Q: An economics professional body estimates that 80% of the students taking undergraduate economics…

A:

Q: Most doctors agree that 75% of those who suffer lung cancer are chain smokers. Based on this data,…

A:

Q: a Pew research center surveyed ask adults in the United States which technology would be very hard…

A: Necessary conditions for binomial experiment: For each trial, there are only two possible…

Q: How large a sample is needed

A: Given :  Margin of error=E=3%=0.03 Significance level=α=0.01 The critical value is ,…

Q: Assume an approximate U.S population of 325 million. Number of death due to heart disease and…

A: GIVEN DATA : Population of U.S is 325 million.                         Number of death due to heart…

Q: Suppose 40% of all vehicles are trucks. Of the next ten vehicles that pass on the road, what is: a)…

A: Given that probability of observing a truck=40% =0.40 Probability of not being a truck= 1- p=q=…

Q: A box contains 5 red and 4 green marbles. If 6 marbles are drawn without replacement, what is the…

A: We have given that Number of success (k) = 5 Population size (N) = 5+4 = 9 Sample size (n)  = 6

Q: Find the probability (in percent) of randomly selecting someone who has an allergy or test negative.

A: We have a given table and using this table we have to find the probability that who has an allergy…

Q: According to a 2009 Reader's Digest article, people throw away about 10% of what they buy at the…

A: Given that,  n=93, p= 0.10 The mean and standard error of the sampling distribution of sampling…

Q: Suppose 45 % of the doctors in a hospital are surgeons. If a sample of 844 doctors is selected, what…

A:

Q: You draw and keep a single coin from a bowl that contains 12 pennies, 9 dimes, and 20 quarters. What…

A: The given information is that the bowl contains the12 pennies, 9 dimes, and 20 quarters.It is known…

Q: If the rework percentage increases to 4%, what is the probability that all 20 samples do not require…

A: 1. Let , X be the number of parts in the sample that does not require rework. Here , X→B(n=0.01 ,…

Q: Consider a single roll of a fair four-sided die. We know that the probability of rolling a '4' is…

A:

Q: What is the probability of it raining, P(B), if it has started snowing? Report P(B), given that it…

A: From the given information, There is a 60% chance of snow. That is, P(A)=0.60 There is a chance of…

Q: A kissed frog has a 70% chance of turning into a prince, while a kissed toad has only a 20% chance…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.