Assume that when adults with smartphones are randomly​ selected, 45​% use them in meetings or classes. If 20 adult smartphone users are randomly​ selected, find the probability that exactly 16 of them use their smartphones in meetings or classes.   The probability is ____. ​(Round to four decimal places as​ needed.)

Q: In a survey of 1390 people, 1034 people said they voted in a recent presidential election. Voting…

A: (a) The probability that among 1390 randomly selected​ voters, at least 1034 actually did vote is…

Q: In a sample of 1200 U.S. adults, 191 think that most celebrities are good role models. Two U.S.…

A: Given data,sample size n = 1200191 think that most celebrities are good role models.here adults…

Q: Assume that male and female births are equally likely and that the birth of any child does not…

A: Binomial Distribution:             It is to obtain the probability of the X successes in N trials,…

Q: In a sample of 900 U.S. adults, 212 think that most celebrities are good role models. Two U.S.…

A: We have given that Sample of 900 U.S adults  212 think that most celebrety are good role model

Q: According to a recent study, 1 in every 7 women has been a victim of domestic abuse at some point in…

A:

Q: A home fire alarm is believed to have a working life T in years given by hazard function Lamda(t) =…

A: The Survival function is given by: It is also known that, where, Now, it is given that,

Q: Approximately 42% of people who purchased beer bought it specifically for consumption during a…

A: From the given information we find the probability that no more than two people brought two beer .

Q: Express the following probability as a simplified fraction and as a decimal. If one person is…

A: Given

Q: Ssume that the rate of 25% Find the probability that among the 584 offspring peas, exactly 152 have…

A: Given n=584 p=0.25

Q: An insurance company prices its Tornado Insurance using the following assumptions: • In any calendar…

A: The given probability of a tornado is 0.12. Let X: No. of tornadoes. X ~ Binom(n = 14, p = 0.12)

Q: An insurance company prices its Tornado Insurance using the following assumptions: In any calendar…

A:

Q: n USE SALT Assuming that intakes at different meals are independent of one another, what is the…

A: Solution

Q: Find the probability that the average the recent price of a movie ticket of a random sample of 56…

A:

Q: An insurance company prices its Tornado Insurance using the following assumptions: In any calendar…

A: From the provided information, In any calendar year the probability of a tornado is 0.07 that is p =…

Q: b. An advertising campaign for a new product is targeted to make 20% of the adult population in a…

A: The probability of success is 20%=0.2 and the population is 400. Therefore use normal distribution…

Q: The internet worm “KLEZ” is the clear leader in the number of top malicious software instances. A…

A:

Q: 19. In a recent year, there were 2,515,458 deaths, and 787,650 of them were due to cardiovascular…

A: Given: Number of deaths = 2515458 Number of deaths due to cardiovascular disease = 787650 The cause…

Q: A metal detector at the entrance of a bank is activated by 0.5% of the people who pass; Let X =…

A:

Q: Suppose that  the average time a fully charged 6-volt laptop battery will operate a computer is 3.2…

A:

Q: Find the indicated probability. Recent statistics show that 62% of people wash their hands after…

A:

Q: c. Find the probability that the number of selected adults saying they were too young is 0 or 1.…

A:

Q: a. What is the probability that a return visit will be needed in all these cases? 0.000244 (Round to…

A: Let , X be the number of return visit will be needed Here , X→B(n=6 , p=0.25) The probability mass…

Q: Based on a​ poll, 60​% of adults believe in reincarnation. Assume that 6 adults are randomly​…

A: Define the random variable x as the number of adults who believe in reincarnation. Here, the number…

Q: Find each of the following probabilities if the probability that A occurs is 38%, and the…

A: Independent event means their intersection probability is equal to their product

Q: In a survey of 1178 people, 888 people said they voted in a recent presidential election. Voting…

A: Given: n = 1178 p = 0.73 q = 1-p = 0.27 Solution: We can use Normal approximation to binomial…

Q: Based on a poll, 40% of adults believe in reincarnation. Assume that 5 adults are randomly selected,…

A:

Q: Q3: A- If approximately 2% of 200 engineering students are left-handed, find the probability that…

A: From the given information we find the solution.

Q: Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds…

A: Obtain the probability that smith will find more than 25 substandard welds.   The probability that…

Q: In a survey of 1136 people, 848 people said they voted in a recent presidential election. Voting…

A:

Q: In a sample of 1100 U.S. adults, 205 think that most celebrities are good role models. Two U.S.…

A: out of 1100 adults 205 thinks that most celebrities are good role models. random sample of size 2 is…

Q: In a survey of 1333 people, 1019 people said they voted in a recent presidential election. Voting…

A: (a) The mean is, μ=np=1333×0.74=986.42 The standard deviation is, σ=np1-p=1333×0.74×1-0.74=16.0147…

Q: a. According to a reputable health organization, a woman has low HDL (higher risk) if her HDL…

A:

Q: Fill in the blank. The states that if, under a given assumption, the probability of a particular…

A: Fill in the blank? The --------- states that If, under a given assumption, the probability of a…

Q: (a) Find the probability that a randomly selected worker contributes to a retirement savings plan at…

A:

Q: A survey of all medium- and large-sized corporations show that 66% of them offer retirement plans to…

A: Solution: From the given information, p=0.66 and n=80.

Q: A group of faculty  were asked if they have a tenured or nontenured  position. The responds are…

A: Given that contingency table Now using this table find required probability.

Q: ased on long experience, an airline found that about 4% of the people making reservations on a…

A: Given: An airline found that about 4% of the people making reservations do not show up for the…

Q: In a hospital, about 3 patients came to the emergency room between 5:00 and 6:00 p.m. The…

A: We have to find given probability..

Q: According to a recent National survey of 200 High School students of driving age, 43 percent stated…

A: The sampling distribution of p-hat is approximately normal with mean p and standard deviation…

Q: An insurance company prices its Tornado Insurance using the following assumptions: In any calendar…

A: Given, 15 year period i.e. the number of trails is n=15 The probability of a tornado is p=0.15 Let X…

Q: Find the indicated probability. A battery company has found that the defective rate of its batteries…

A: From the provided information, The defective rate of batteries (p) = 0.05 Sample size (n) = 7

Q: Find the probability of randomly selecting a student who spent the money, given that the student was…

A: a. The column and row totals are,   Purchased Gum Kept the Money Total Students Give Four…

Q: A workshop tows in an average of five damaged cars per week. Find the probability that exactly 20…

A:

Q: In a survey of 1167 people, 860 people said they voted in a recent presidential election. Voting…

A: Consider X be a random variable which follows binomial distribution indicates the number of people…

Q: (a) Find the probability that a randomly selected worker contributes to a retirement savings plan at…

A: It is given that Total = 500 Number of males = 250 Number of workers contribute = 275

Q: An aircraft seam requires 20 rivets. The seam will have to be reworked if any of these rivets is…

A: Given data: An aircraft  seam requires   = 20

Q: In a survey of 1170 people, 816 people said they voted in a recent presidential election. Voting…

A: Given : n = 1170 p = 0.67

Q: According to a study published by a group of University of Massachusetts sociologists, about two…

A:

Q: Participants in a 2-day biking event, cross the finish line at a rate of 10 bike riders per fifteen…

A:

Q: Based on a smartphone survey, assume that 55% of adults with smartphones use them in theaters. In a…

A: Solution: Given information: Let X be the random variable of adults used smartphone in the theater…

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.