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- Let N(t) be the percentage of a state population infected with a flu virus on week t of an epidemic. What percentage is likely to be infected in week 4 if N(3) = 8 and N'(3) = 1.2?What is a step-by-step way to Prove the following equivalency relation in the description? ¬P ∧¬Q≡¬(P ∨Q)Assume that σ12 = σ22 = σ2. Calculate the pooled estimator of σ2 for s12=50, s22=57 and n1 =n2 =18.
- The following question is on statistics. An automatic car wash takes exactly 5 minutes to wash a car. On average, 10 cars per hour arrive at the car wash. Suppose that 30 minutes before closing time, 5 cars are in line. If the car wash is in continuous use until closing time, is it likely anyone will be in line at closing time?Suppose that a consumer cannot vary hours of work as he or she chooses. In particular, he or she must choose between working q hours and not working at all, where q > 0. Suppose that dividend income is zero, and that the consumer pays a tax T if he or she works, and receives a benefit b when not working, interpreted as an unemployment insurance payment. a. If the wage rate increases, how does this affect the consumer’s hours of work? What does this have to say about what we would observe about the behavior of actual consumers when wages change? Explained also with the graph b. Suppose that the unemployment insurance benefit increases. How will this affect hours of work? Explain the implications of this for unemployment insurance programs. Explained also with the graph1 Events X and Y are such that P(x)=0.35 and P(x or y)=0.80. Given that X and Y are independent and non‐mutually exclusive, determine p(y). Give your finalanswer as a percentage to two decimal places.
- Have you ever agreed to give up your airplane ticket in return for a free ticket? Have you ever searched for the cheapest flight so that you could visit a special friend? This example provides some of the analysis that leads to results such as overbooked flights and reduced fares on certain flights. Suppose that you are in charge of marketing airline seats for a major carrier. Four days before the flight date you have 16 seats remaining on the plane. You know from past experience data that 80% of the people that purchase tickets in this time period will actually show up for the flight. a. If you sell 20 extra tickets, what is the probability that you will overbook the flight or have at least 1 empty seat? b. If you sell 18 extra tickets, what is the probability that you will overbook the flight or have at least 1 empty seat?The owner of a pet store is trying to decide whether to discontinue selling specialty clothes for pets. She suspects that only 10% of the customers buy specialty clothes for their pets and thinks that she might be able to replace the clothes with more interesting and profitable items on the shelves. Before making a final decision she decides to keep track of the total number of customers for a day, and whether they purchase specialty clothes for their pet. a) Assuming the pet store owner is correct in thinking that only 10% of her customers purchase specialty clothes for their pets, how many customers should she expect before someone buys a garment for their pet? b) What is the probability that she does not sell a garment until the 5th customer? c) What is the probability that exactly 4 of the first 10 customers buy specialty clothes for their pet? d) What is the probability that at least 3 of the first 35 customers buy specialty clothes for their pet?…A research center claims that 26% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1000 adults in that country, 29% say that they would travel into space on a commercial flight if they could afford it. At α=0.05, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state H0 and Ha. "Recall that the claim is the percentage of adults in the country would travel into space on a commercial flight if they could afford it. Let a success be an adult in the country who would travel into space on a commercial flight if they could afford it. Translate the claim made about the population parameter from a verbal statement to a mathematical statement." (b) Use technology to find the P-value. (c) Decide whether to reject or fail to reject the null hypothesis and (d) interpret the decision in the context of the original claim.
- There was a compete e^AT partIn a staff meeting called to address the problem of returned cheques at the supermarkets where you areinterning as a financial analyst, the bank reports that 12 percent of all cheques are returned for insufficientfunds, and of those, in those 50 percent of cases, there was cash given back to the customer. overall ,10percent of customers ask for cash back at the end of their transaction with the store. For 1,000 customervisits, how many transactions will involve: (f) insufficient funds?(g) Cash back to the customer?(h) Both insufficient funds and cashback?(i) Either insufficient funds or cash back?N owns a Disability Income policy that will cover him to age 65, allhough the insurance company has the right to change the premium rate for the overall risk class to which N is assigned Which of he following types of renewability best describes this situation? A. Noncancellable B. Cancellable C. Guaranteed Renewable D. Optionally Renewable