4. According to a study, 91% of all adults have a cell phone. An employee of a cell phone company attends a community event and has a special offer to give to first time cell phone owners. If she randomly selects adults in attendance at the event and cell phone ownership is independent from adult to adult, what is the probability that she asks 21 adults total to find the first one that does not own a cell phone? (A) (0.91)^{20}(0.09)(0.91)20(0.09) (B) (0.09)^{20}(0.91)(0.09)20(0.91) (C) 20(0.91)^{20}(0.09)20(0.91)20(0.09)

Q: 19. Suppose mass-produced needles are packed in boxes of 1000. It is believed that 1 needle in 2000…

A:

Q: The probability that a region prone to hurricanes will be hit by a hurricane in any single year is…

A: Solution: The probability that a region prone to hurricanes will be hit by a hurricane in any single…

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: the probability that more than 17 of the students smoke?

A: Given : n=75 , p=0.277 , q=1-p=1-0.277=0.723 Here  np=75*0.277=20.7750>5 and…

Q: The incidence of occupational disease in an industry is such that the workmen have a 20% chance of…

A:

Q: The probability that South Florida will be hit by a major hurricane (category 4 or 5) in any single…

A: The probability that South Florida will be hit by a major hurricane (category 4 or 5) in any single…

Q: 2. In a factory that produces pieces of ready-made concrete, if the percentage of producing…

A: Given,n=5p=0.6q=1-p=1-0.6=0.4X=no.of defective piecesX~Binomial (n=5 , p=0.6)P(X=x)=nx px qn-x    ;…

Q: The percentage of female Americans 25 years old and older who have completed 4 years of college or…

A:

Q: pproximately 7% of the population has the O- blood-type. If you drew a random and independent sample…

A: p = 0.07 n = 2065

Q: 5. To avoid detection at customs, a traveller has placed 6 narcotics tablets in a bottle containing…

A:

Q: 5. A traveler wanted to avoid detection at customs. He placed 6 narcotic tablets together with 9…

A:

Q: On average, 5.5 shoplifting incidents occur per week at an electronics store.  What is the…

A: Poisson Distribution :  A Poisson distribution is a discrete probability distribution that applies…

Q: Suppose 58% of politicians are lawyers. If a random sample of size 681 is selected, what is the…

A: It is given that n =681 and p =0.58.

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 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: 2) The manager of a restaurant believes that waiters and waitresses who introduce themselves by…

A: Given information: x¯1=18, σ1=3, n1=10x¯2=15, σ1=3, n2=10    Null hypothesis: H0 : μ1=μ2Alternative…

Q: Suppose that 9% of college undergraduates suffer from a psychological disorder. What is the…

A: Let p be the probability that an undergraduate has a psychological disorder. Given that p = 0.09 Let…

Q: According to a study, 20% of corporate officers are women. Suppose that you select a random sample…

A:

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

A:

Q: It is assumed that 78% of the seeds of a certain type of wheat germinate. If we randomly select 340…

A:

Q: It is estimated that 30% of Canadians with age between 60 and 65 had smoked for a long period of…

A:

Q: #02.  The top web browser in 2015 was Chrome with 51.74% of the market. In a random sample of 250…

A: Population proportion = 0.5174 Sample proportion = 110/250 = 0.44

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: The probability that South Florida will be hit by a major hurricane (category 4 or 5) in any single…

A: Given that the probability that South Florida will be hit by a major hurricane (category 4 or 5) in…

Q: A phone company reports that 52 % of its customers subscribe to their high-speed internet service.…

A:

Q: Suppose the probability of purchasing a defective smart phone is 0.04. What is the probability of…

A: Introduction: Denote X as the number of defective smart phones obtained in a purchase of 20 smart…

Q: D) The probability of surviving 2 years after being diagnosed with a slow-progressing form of…

A: The correct answer is Option D.   The probability of surviving year 1 after being diagnosed with a…

Q: To avoid detection at customs, a traveler places 6 narcotic tablets in a bottle containing 9 vitamin…

A: In the bottle, there are (6+9) = 15 tablets. Among the 15 tablets, 6 are narcotic tablets and 9 are…

Q: 4. A parent's chance of passing a rare inherited disease on to a child is 0.25. What is the…

A:

Q: 8. Find the probability of getting a total score of 15 points in a throw of three identical dice.

A: To find the probability of getting a total score of 15 points in a throw of three identical dice.

Q: or the fiscal year​ 2007, a tax authority audited 1.74​% of individual tax returns with income of​…

A: It is given that the probability that a randomly selected individual for audit will have income…

Q: 6. An old camera has a 45% chance of not responding after taking a shot. What is the probability…

A: Given: Probability of not responding (p)=0.45  the shot number on which camera stop responding(x)=6

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

A:

Q: 3) What is a probability of selecting a customer whose expenditure is differ than the population…

A: Given Information: The expenditure for all customers at this supermarket is normally distributed…

Q: It is known that 1/3 of the probability of getting rid of a disease. What are the chances of getting…

A: Given, The probability that a randomly selected person will be saved = 1/3=0.333 Let X denotes the…

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: According to a study 20% of corporate officers are women. Suppose that you select a random sample of…

A: Z-score for proportion:

Q: 3. An oil change crew is trying to determine how long the average line for an oil change will be.…

A: Given Arrival rate =20 c/hr

Q: According to a study, 20% of corporate officers are women. Suppose that you select a random sample…

A:

Q: 62% of Armenian students own a personal computer. What is the probability that the proportion of…

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

Q: Suppose that more than a decade ago high levels of lead in the blood put 82% of children at risk. A…

A: From the provided information, Sample size (n) = 100 Proportion (p) = 0.82 Let X is a random…

Q: 13. Suppose that a lot of 5000 electrical fuses contain 5% defectives. If a sample of five fuses is…

A: Given,n=5000p=0.05here A random variable X~Poisson(λ)because n is large and p value very smallso ,…

Q: Suppose a certain study conducted in 2000 reported 71.3% of men between the ages of 45 and 54 are…

A:

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: 9. The CDC estimates that a non-infected person has a 10% chance of contracting mumps from an…

A: From the given information, the CDC estimates that a non-infected person has a 10% chance of…

Q: 1. In a factory that produces pieces of ready-made concrete, if the percentage of production of…

A: Givenp=0.6n=5x~Binomial(n=5,p=0.6)P(X=x)=Cxn px (1-p)n-x  ; x=0,1...,n

Q: 80% of students pass Chemistry 101. Knowing this, Manuel didn't study for the midterm and ended up…

A: From the given information, 80% students pass chemistry 101. So, the remaining 20% fails chemistry…

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.