A study of​ 420,095 cell phone users resulted in 135 who developed cancer of the brain or nervous system. When comparing this sample group to another group of people who did not use cell​ phones, it was found that there is a probability of 0.512 of getting such sample results by chance. What do you​ conclude?

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A: Let V be the event that selected person voted in the last school board election, R be the event that…

Q: Suppose a basketball player makes 56.1% of shots and that the probabilty of making each shot is…

A:

Q: In a study of 233,537 cell phone users, it was found that 80 developed cancer of the brain or…

A: We have to use binomial approximation to normal.

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Q: A company claims that 67% of adults can distinguish its bottled water from tap water. In a test of…

A: Given Data population proportion,p = 0.67 sample size n = 250

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A: Givenp=0.35n=10Let "x" be the people have bathed their pets…

Q: In a study of 233,537 cell phone users, it was found that 80 developed cancer of the brain or…

A: We have given that  p= 0.000369 , n= 233537 We use normal approximations

Q: A national survey indicated that 25% of adults conduct their banking online. It also found that 35%…

A: As per our guidelines, we can answer only the first question, Kindly repost the others for answers…

Q: Find the indicated probability. 1) Of 1454 people who came into a blood bank to give blood, 357 were…

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Q: It is commonly presumed that an unborn child has a 50% prob ability of being female. But is this…

A: From the provided information, Sample size (n) = 585609 From which 286114 were girls that is x =…

Q: A market research firm conducts telephone surveys with a 38% historical response rate. What is the…

A: Defines that p is true proportion of telephone numbers that will cooperate and respond to the…

Q: If a household in this district is selected at random, what is the probability that its income is at…

A: 1) f a household in this district is selected at random, what is the probability that its income is…

Q: survey of 2436 men age 18 and older in 1998 for the commonwealth Fund indicated that more than half…

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Q: the Netherlands for the years 1989. 1990, and 1991. According to the Central Bureau of Statistics,…

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Q: The Employee Benefit Research Institute reports that 69% of workers reported that they and/or their…

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Q: A survey showed that 77% of adults need correction (eyeglasses, contacts, surgery, etc.) for their…

A: Let X is defined as the number of adults need correction for their eyesight which follows binomial…

Q: According to the U.S. Census Bureau, the probability a randomly selected worker primarily drives a…

A: Given :  Probability a randomly selected worker primarily drives a car to work is 0.76 , P(private…

Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

A: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

Q: ) What is the probability that there are exactly 2 defective phone batteries in the sample? ) What…

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

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Q: In a recent survey of 619 Salinas residents, 437 stated they experienced significant traffic delays…

A: Given: Total number of Salinas  residents = 619 The number of residents who experienced delays = 437…

Q: According to the mal Activity Defens (a secret people have come in contact with an extraterrestrial…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

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Q: According to an American Laser Centers survey, 32% of adult men said that their stomach is the least…

A:

Q: A motion by one of the board members of a town proposed that Brgy. San Vicente be annexed to its…

A: The probability of opposing the proposal is 50% and favoring is 50% p=0.5,q=0.5 also n=20. The…

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

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Q: According to a report of a particular machined parts inspection process, 5% of all machined parts in…

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

Q: It is commonly presumed that an unborn child has a 50% prob ability of being female. But is this…

A: Here, x = 286,114 and n = 585,609.

Q: It is known that 60% of customers will need additional maintenance on their vehicle when coming in…

A: We have given that  Sample size n =50 Sample proportion p^=60%=0.60

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

A: Given: p=0.69

Q: A manufacturer of aspirin claims that the proportion of headache sufferers who get relief with just…

A: It is given that the proportion of headache sufferers who get relief with just two aspirins is 64%.

Q: In a study of 354,079 cell phone users, it was found that 139 developed cancer of the brain or…

A: The standard normal variable Z based on proportions is defined as, z = (p̂ – p)/ √[p (1 – p)/n]…

Q: At a train reservation counter, customers come to desk with a mean time of 2.5 minutes. What is the…

A: Given, Mean = λ = 2.5 Minutes   This is the case of poisson distribution. The proability…

Q: The probability that a randomly chosen student in a statistics class submits his/her homework on…

A: Given,n=50p=0.10q=1-0.10=0.9A random variable X~Binomial(n=50  ,  p=0.10)P(X=x)=Cx50 0.1x0.950-x…

Q: In a 2018 study, it was determined that 14% of Americans smoke. In a separate study, it was…

A: Given data: Percentage of Smokers is 14%. Percentage of smokers who die of lung cancer is 9%.…

Q: 29 percent of all Samsung cell phones are submitted for service while under warranty. Of these, 66…

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Q: At the local cell phone store, the 5.22 Cell phone and case probability that a customer who walks in…

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Q: According to IT department of leading financial firm, 50% of emails received by their employees are…

A: Let A : email is detected as spam B1 : email is a spam email P(B1)=0.5 B2 : email is  not a spam…

Q: In a study of 349,212 cell phone users, it was found that 26 developed cancer of the brain of…

A:

Q: Use the given probability value to determine whether the sample results could easily occur by…

A: If the probability of event is greater than 0.05 that it is likely to occur and if the probability…

Q: A class president is favored by 53% of all students voting, assuming this is accurate, a random…

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Q: Among 6464 cases of heart pacemaker​ malfunctions, 341   were found to be caused by​ firmware,…

A: Provided information is, among 6464 cases of heart pacemaker malfunctions, 341 were found to be…

Q: The probability of a radar station detecting an enemy plane is 0.65 and the probability of not…

A: We have to find expected no. Of stations detect plane.

Q: A research institute reports that  66 % of workers reported that they   and/or their spouse had…

A: According to the provided data, the sample size, n is 40 and the probability of success, p is…

Q: Use the given probability value to determine whether the sample results could easily occur by​…

A: We are given:A study of the effect of seatbelt use in​ head-on passenger car collisions found that…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.