Suppose that in the population twenty out of twenty-five Armenian companies are expecting bad economic times for the year of 2021. If you do a sample of 25 Armenian companies, what is the probability that the proportion of companies that expect bad economic times will be more than 0.79 (round to 3 decimal places)?

Q: An analyst predicted that 3.5% of all small corporations would file for bankruptcy in the coming…

A:

Q: Suppose 34% of cubes processed by a machine have side lengths less than 100mm. A random sample of 60…

A: Solution: From the given information, the probability of a cube processed by a machine has side…

Q: A recent study for Las Vegas showed that the probability of an individual resident moving in a given…

A: Solution: Let X be the number of times an individual will move and n be the number of years. From…

Q: Suppose 56 % of politicians are lawyers. If a random sample of size 873 is selected, what is the…

A:

Q: Suppose we are in an experiment where each trial has p = 1/6 chance of success, and that the trials…

A: 1. Given p = 16     n = 12     x = 3 P(X=x) = Cxn px (1-p)n-x  ; x=0,1,2....n…

Q: Suppose a certain retail store has customers whose ages are normally distributed such that µ=37.5…

A: Solution: Probability that a randomly chosen customer is between 46 and 54 years old is 0.1167

Q: Suppose that the New England Colonials baseball team is equally likely to win a game as not to win…

A: Given that the New England Colonials baseball team is equally likely to win a game as not to win it.…

Q: A new surgery is successful 80 percent of the time. If the results of 9 such surgeries are randomly…

A: P =Probability of successful surgery and x=no of successful surgerys.  given, P=0.08              n…

Q: If 15% of adults in a certain country work from home, what is the probability that fewer than 54 out…

A: Given that  Sample size n =450 Population  proportion p =0.15

Q: Suppose a company charges an annual premium of $475 for a fire insurance policy. In case of a fire…

A: We make a probability distribution for claims Claim (xi) 0 100000 Probability (pi)…

Q: Suppose the probablility of a part functioning correctly in a copy machie is 0.98. If the machine…

A:

Q: Assume that there is a 10% rate of disk failure in a year  A) if all your computer data is stored…

A: P[a disk failure]=0.1,  (A) P[at least one working drive out of two]=1-P[none are working out of…

Q: An air conditioner contractor has prepared an offer to repair the air conditioner compressor. To…

A: Introduction to Exponential distribution: A random variable X is said to have a exponential…

Q: Suppose that 18% of people that enter a car dealership buy a car that day from that dealer. What is…

A: According to central limit theorem, the sampling distribution of sample proportion follows the…

Q: Suppose the influenza vaccine this year is 88% effective to prevent the flu among high-risk…

A: Probability, p = 88% = 0.88Sample size = 25

Q: A certain medical test is known to detect 68% of the people who are afflicted with the disease Y. If…

A: Given: Sample Sizen=10 The proportion of people who are detected to have a disease is given as:…

Q: It is known that roughly 2/3 of all human beings have a dominant right foot or eye. Is there also…

A:

Q: A researcher believes that 7% of female smoke cigarets if the researchers correct what is…

A: Calculation:Denote π as the true population proportion of female smokers. Hence, π = 0.07.Denote p…

Q: Suppose that, for a particular type of cancer, chemotherapy provides a 5-year survival rate of 80%…

A:

Q: The average age of residents in a large residential retirement community is 69 years with standard…

A: Here, the average age of residents in a large residential retirement community is 69 years with…

Q: Assume that the probability of recovering from a brain surgery is 0.9. Considering the next 100…

A: p=0.9 n=100

Q: Suppose 46 % of politicians are lawyers. If a random sample of size 662 is selected, what is the…

A: Given : Let p be the proportion of Politicians are lawyers = 0.46 n = 662 μp^ = p μp^ = 0.46…

Q: If 15% of adults in a certain country work from home what is the probability that fewer than 30 out…

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

Q: If 15% of adults in a certain country work from home, what is the probability that fewer than 48 out…

A:

Q: The annual volume of rain (in mm) in a certain region is normally distributed with μ = 40 and a σ =…

A:

Q: Suppose we observe 84 alcoholics with cirrhosis of the liver, of whom 29 have hepatomas—that is,…

A:

Q: A survey of all medium- and large-sized corporations showed that 69% of them offer retirement plans…

A: From the provided information, A survey of all medium- and large-sized corporations showed that 69%…

Q: A sample of 400 adults were surveyed on their health. 78 of those studied have high blood pressure,…

A: Solution: Given that : Total people = 400No of people that are unwilling to change diet = 94

Q: USA Today reported that Parkfield, California, is dubbed the world's earthquake capital because it…

A: Given thatSince 1857, Parkfield has had a major earthquake one the average of 1.3 times every 22…

Q: The probability that a randomly selected patient who visits the ER will die within 1 year of visit…

A:

Q: Suppose 51% of the population has a retirement account.   If a random sample of size 530 is…

A: Using ‘normal approximation conditions’ check whether the proportion can be approximated to normal…

Q: 4 . Suppose you bought two computers, one has an exponential life time of mean 10 years and the…

A: The cumulative distribution function for the lifetime of the first computer is given by the cdf of…

Q: Suppose 50 % of politicians are lawyers. If a random sample of size 518 is selected, what is the…

A: Consider that p is proportion of all politicians.

Q: Suppose a certain retail store has customers whose ages are normally distributed such that µ=37.5…

A: givenμ=37.5σ=7.6

Q: Suppose 44 % of politicians are lawyers. If a random sample of size 411 is selected, what is the…

A:

Q: Suppose that the New England Colonials baseball team is equally likely to win a game as not to win…

A: It is given that the winning of a game is equally likely. Let the variable X be the number of games…

Q: A recent survey found that 86% of first-year college students were involved in volunteer work at…

A: The provided information are:Proportion of first-year college students were involved in volunteer…

Q: Suppose that 28.7% of Canadians contributed to their RRSP (registered retirement fund) this year. If…

A: We have given that,  X be the random variable from binomial distribution with p= 28.7% = 0.287 and…

Q: A sample of 400 adults found that 82  have high blood pressure. However, 98 of those studied…

A: The total sample of adults is 400.

Q: suppose we select an SRS of 1010 adults. If it is believed that 60% of all adults are very satisfied…

A: From the provided information, Sample size (n) = 1010 60% of all adults are very satisfied with…

Q: Suppose 50% of the registered voters in a country are Republican if a sample of 598 voters is…

A: Given

Q: 2. It has been observed that an average of 3 crabs in a crab swarm are eaten every minute by their…

A: 2. Obtain the probability that 5 crabs will be eaten next two minutes. The probability that 5 crabs…

Q: Suppose we observe 84 alcoholics with cirrhosis of the liver, of whom 29 have hepatomas—that is,…

A:

Q: Suppose the average tread-life of a certain brand of tire is 45,000 miles and that this mileage…

A:

Q: According to a recent study, 62% of adults of age 65 and older do not have sufficient funds saved…

A:

Q: Suppose that 20% of the adult women in the United States dye or highlight their hair. We would like…

A: In this question it has been given that,Proportion of women in US dye or highlight their hair =…

Q: Suppose a certain retail store has customers whose ages are normally distributed such that µ=37.5…

A: We have to find the probability that a randomly chosen customer is more than 48 years old..

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.