9. According to the latest Gallup Poll, 65% of American Teenagers purchase iPhones. Assuming this percentage is true for all teenagers. What is the probability that out of the next 20 teenagers who purchase cell phones at least 7 will not purchase iPhones? a) 0.0060 b) 0.9985 c) 0.6010 d) 0.5834 e) 0.0045

Q: What is the probability a randomly selected worker does not drive a car to work?

A: Here we have given the information, According to the U.S. Census Bureau, the probability a randomly…

Q: The proportion of a population under the age of 18 is known to equal 0.42 (42%). a) Determine the…

A: The proportion of a population under the age of 18 is known to equal 0.42.

Q: According to the Center for Disease Control (CDC), 46.8% of Americans get a flu shot each season.…

A: Let X be the Random variable from binomial distribution with probability (p) = 46.8% = 0.468 and…

Q: 1) The mean number of births per day is........? 2)  The probability​ that, in a​ day, there are 15…

A: Since , the number of atoms decayed during 365 days is 29522/365=80.8822 Let , X be the number of…

Q: Consider the case when the predetermined average number of bus arrivals at the Cubao station is 6…

A: Solution: Let X be the number of buses arriving a 15 minute period. From the given information,…

Q: The mean number of power outages in the city of Manila is 5 per year. Find the probability that in a…

A: Let X be the number of power outages in the city of Manila Mean λ=5

Q: You want to determine the probability that when five consumers are randomly selected, exactly two of…

A: The question is about binomial prob. distribution Given : No. of randomly selected customers ( n ) =…

Q: 5. The Gallup Poll once asked an SRS of 1540 adults, "Do you happen to jog?" Suppose 15% of all…

A: We have to find probably using z table

Q: At a local community college, 40% of students who enter the college as freshmen go on to graduate.…

A: Solution: a. Let X be the number of students who enter the college as freshmen go on to graduate and…

Q: Suppose 55% of recent college graduates plan on pursuing a graduate degree. Fourteen recent college…

A:

Q: According to Financial Executive, disability causes 48% of all mortgage foreclosures. Given that 20…

A: Given, P = 0.48 n = 20

Q: According to TMUSS Quarterly (Totally Made-Up Sports Statistics) April 2017, the probability that…

A: Let us denote: The Tampa Bay Buccaneers will score a touchdown on their opening drive=A the Bucs…

Q: According to a magazine, as of January 2018, 12% of chief executive officers were women. Complete…

A: Given, Probability of the female officer p = 0.12 Sample size n = 12

Q: ccording to a survey by Accountemps, 48% of executives believe that employees are most productive on…

A:

Q: In a poll conducted by the general social survey, 70% of respondents said that their jobs were…

A: Probability of respondents said that their jobs were sometimes or always stressful(p)= 0.70sample…

Q: According to a Gallup Poll, the probablity that a Republican approves of the death penalty is 64%.…

A: given data P( approves of the death penalty) = p = 0.64sample size (n) = 13x = no. of republicans…

Q: A robot has a probability to solve a puzzle of 47% if the robot tries to solve 10 puzzles. 1. What…

A: A random variable will follow the binomial distribution if it follows the conditions given below.…

Q: Suppose that 43% of people own dogs. If you pick two people at random, what is the probability that…

A:

Q: A school newspaper reporter decides to randomly survey 18 students to see if they will atte…

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Q: According to a survey, 10% of Americans are afraid to fly. Suppose 1100 Americans are sampled. a)…

A:

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.