According to a study, 80 % of adult smokers started smoking before 21 years old. 10 smokers 21 years old or older are randomly selected, and the number of smokers who started smoking before 21 is recorded. 1. The probability that at least 6 of them started smoking before 21 years of age is  Show your work below:   2. The probability that at most 7 of them started smoking before 21 years of age is  Show your work below:   3. The probability that exactly 9 of them started smoking before 21 years of age is  Show your work below:

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A:

Q: 33% of all college students major in STEM (Science, Technology, Engineering, and Math). If 45…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

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A: Solution : p = 48% = 48/100 = 0.48 n = 33 Let x be the number of violent felons in the…

Q: Suppose that the probability that a child living in an urban area in the United States is obese is…

A: From the given information p = 0.20 and n = 15.

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Q: Suppose a math class contains 44 students. There are 23 females (four of whom speak Spanish) and 21…

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A: Let the random variable X denote the no. of violent felons in the prison system are repeat offenders…

Q: It was reported that 19.8% of computer games sold in 2005 were classified as "family and…

A: Given Let A = computer games sold were classified as " family and children" P(A)=19.8%=0.198

Q: 60% of all violent felons in the prison system are repeat offenders. If 49 violent felons are…

A: Since, you have you have posted a question with multiple subparts we will solve first three subparts…

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Q: a. Exactly 16 of them are repeat offenders. b. At most 21 of them are repeat offenders. c. At least…

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Q: Based on a poll , among adults who regret getting tattoos, 28% say that they were too young when…

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

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A: Givenp=0.23n=10x~Binomial(n=10,p=0.23)P(X=x)=(nx)×px×(1-p)n-x     ; x=0,1,...,n

Q: According to a study, 50 % of adult smokers started smoking before 21 years old. 15 smokers 21 years…

A: This question requires accurate results, Hence I will use excel to solve this question. Let "X"…

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Q: Based on a​ poll, among adults who regret getting​ tattoos, 28​% say that they were too young when…

A: According to bartleby expert guidelines we can answer only first three subparts. Rest can be…

Q: Suppose a math class contains 42 students. There are 22 females (two of whom speak Spanish) and 20…

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

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A: Givenn=48p=0.31x~Binomial(n=48,p=0.31)

Q: Suppose a math class contains 28 students. There are 17 females (two of whom speak Spanish) and 11…

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Q: According to a study, 80 % of adult smokers started smoking before 21 years old. 6 smokers 21 years…

A: Given,n=6p=0.8q=1-pq=1-0.8=0.2A random variable X~Binomial(n=6 , p=0.8)P(X=x)=6x0.8x0.26-x  ;…

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A: Formula : Binomial distribution is given by

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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.