According to an almanac, 80% of adult smokers started smoking before turning 18 years old. (a) If 400 adult smokers are randomly selected, how many would we expect to have started smoking before turning 18 years old? (b) Would it be unusual to observe 360 smokers who started smoking before turning 18 years old in a random sample of 400 adult smokers? Why? adult smokers to have started smoking before turning 18 years old. (a) We would expect about (Type a whole number.)

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of female students is 20. Thus, the total number of students is 20+20 = 40.

Q: A jury of 6 persons was selected from a group of 20 potential jurors, of whom 8 were African…

A: calculate the simple probability as given..................

Q: A 5-card hand is dealt from a perfectly shuffled deck so that each 5-card hand is equally likely.…

A: Let X denote the expected number of hearts in 5 card hand. Form probability distribution for the…

Q: g) The Mathematics Department of the University of Louisville consists of 8 professors, 6 associate…

A: From the given information, there are 8 professors, 6 associate professors and 13 assistant…

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 The number of female students is 20. The total number of students…

Q: An economics professional body estimates that 75% of the students taking undergraduate economics…

A: Solution: Let X be the random variable that students taking undergraduate economics courses are in…

Q: Smokers started smoking before turning 18 years old. (a) If 100 adult smokers are randomly selected,…

A: We have to find expected value standard deviations and usual range  for given data..

Q: a) in a random sample of 5 customers, 60% of them use a cashpoint machine at least once a month? b)…

A: here given , a bank claims that 80% of its customers use a cashpoint at least once a month  p =0.80…

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A: her given there are total 1500 students in college  35% between the ages of 18 and 24,   that is…

Q: According to an almanac, 80% of adult smokers started smoking before turning 18 years old. (a) If…

A: Given Information: 80% of adult smokers started smoking before turning 18 years old. i.e., p=0.80…

Q: An anger-management course claims that, after completing its seminar, participants will lose their…

A: (1)

Q: According to an almanac, 60% of adult smokers started smoking before turning 18 years old. (a) If…

A:

Q: According to an almanac, 80% of adult smokers started smoking before turning 18 years old. (a) If…

A: Given :  n=100 and p=80% = 0.80

Q: or its Music 360 survey, Nielsen Co. asked teenagers and adults how each group has listened to music…

A: Selecting 10 teenagers randomly and asking that whether they use Pandora Media Inc.’s online service…

Q: What is the expected frequency for a Male Shopper to regularly shop at a Grocery Chain?

A: HERE USE GIVEN CONTINGENCY TABLE   Grocery chain Discount store  Membership warehouse  Total…

Q: In a family with 2 children, excluding multiple births and assuming that a boy is as likely as a…

A: Let B=Boy and G=Girl Possible number of outcomes for two children are {BB, BG, GB, GG} Let x= number…

Q: It is estimated that 75% of all young adults between the ages of 18 and 35 do not have a landline in…

A: Givenp=0.75sample size(n)=100Let "x" be the adults do not own a…

Q: 9. Mang Kiko, a banana plantation owner, plans to expand his banana business due to recent…

A:

Q: If 10% of men are bald, what is the probability that fewer than 100 in a random sample of 900 are…

A: Solution:Binomial distribution approximated to normal distribution or not is checked below:It is…

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A: The total number of subjects available is 45. The number of selected subjects is 5.

Q: In exercises 21-14, assume that when adults with smartphones are randomly selected, 54% use them in…

A:

Q: The Mathematics Department of the University of Louisville consists of 8 professors, 6 associate…

A:

Q: Single adults: According to a Pew Research Center analysis of census data, in 2012, 20% of American…

A: Given Sample size =n=100 Population proportion p0=0.20

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 and the number of female students is 20.

Q: According to the National Institute on Alcohol Abuse and Alcoholism, and the National Institutes of…

A: Solution: State the hypotheses. Null hypothesis: H0: p=0.41 Alternative hypothesis: Ha: p<0.41…

Q: 7. A principal randomly chose 30 students from grade 8. Of these students, 9 were wearing watches.…

A: Given ,  A principal randomly chose 30 students from grade 8 . Of these students, 9 were wearing…

Q: Suppose 54% of the banks in Switzerland are private organizations. If a sample of 705 banks is…

A: Solution: From the given information, p=0.54 and n=705.

Q: According to a 2019 survey by Sleepopolis, 34% of American adults sleep with some form of "comfort…

A: Let the random variable X be the number of American adults sleep with a comfort object from sample…

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A: We have to find mean and standard deviation..

Q: A recent study suggested that 70% of all eligible voters will vote in the next presidential…

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A: Sampling methods: In simple random sampling, all the units in the population have equal chance of…

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Q: what is the expected number of participants who arrived from 8 to 10 am?

A: Here Given  Arrival Rate= 5 per hour  No of team member in each team is Independent and takes value…

Q: According to a report, 57.5% of murders are committed with a firearm. (a) If 200 murders are…

A: Given : n = 200 p = 0.575

Q: According to an almanac, 60% of adult smokers started smoking before turning 18 years old. (a) If…

A: Given : p = 0.60 n = 300

Q: 80​%of adult smokers started smoking before turning 18 years old. ​(a) If 200 adult smokers are…

A: Given that   Percent Adult smokers started smoking before 18 years old  = 80% = 0.80   We know that…

Q: According to an almanac, 80% of adult smokers started smoking before turning 18 years old. (a) If…

A: Solution

Q: rom the U.S. Census Bureau’s American Community Survey in 2019 it was found that 33.13% of United…

A: since there are multiple parts, first three subparts are answered. kindly repost for more help .

Q: 9. Mang Kiko, a banana plantation owner, plans to expand his banana business due to recent…

A:

Q: If 54% of all Americans approve the recent job performance of the president, what is the expected…

A: Given: n=1036 p = 54% of all Americans approve the recent job performance of the president = 0.54…

Q: What is the probability of getting a sample in which more than 70% think that airplanes would be…

A: Let p be the true proportion of adults who think airplanes would be safer places if airlines…

Q: What is the probability of a random student being chosen who is a female and is not between the ages…

A: Given,          PM=0.60          PAge 18 and 20=0.35          PM and Age 18 and 20=0.26…

Q: What is the expected number of times you would have to spin a roulette wheel to win 3 times in a row…

A: Given, A roulette wheel is spinned. So, The probability to win on any number is given here as: 138…

Q: The sample space for independent events A and B is 512. If the sample space for event A is 16, what…

A: We have to find out sample space for event B..

Q: What is the probability of randomly selecting a female respondent from the sample?

A: Given contingency table is:   Probability = number of favorable events/ Total number of events in…

Q: What is the expected count a for the number of people ages 11- 25 who prefer piglets?

A:

Q: According to an​ almanac, 60​% of adult smokers started smoking before turning 18 years old. ​(a) If…

A: Given Information: proportion p=60%=0.60 (a) If 300 adult smokers are randomly selected, how many…

Q: What is the theoretical Probability of drawing a Red Card from a standard deck of shuffled cards and…

A: Standard deck of card has 52 cards

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.