Assume that 26.6% of people have sleepwalked. Assume that in a random sample of 1517 ​adults, 418 have sleepwalked. a. Assuming that the rate of 26.6% is​ correct, find the probability that 418 or more of the 1517 adults have sleepwalked. b. Is that result of 418 or more significantly​ high? c. What does the result suggest about the rate of 26.6​%?

Q: 30% of the firm's orders are from first time customers. Consider random sample of 84 orders. Find…

A: Given,n=84p=0.30

Q: The quality control manager of​ Marilyn's biscuits is inspecting a batch of​ chocolate-chip biscuits…

A:

Q: Given a normal population whose mean is 665 and whose standard deviation is 24, find each of the…

A: The following information has been given: The population mean is μ=665. The population standard…

Q: Given a normal population whose mean is 325 and whose standard deviation is 73, find each of the…

A: GivenMean(μ)=325standard deviation(σ)=73

Q: Suppose the correlation between two random variables X and Y are 0. a. Must it be true that X and Y…

A:

Q: A research firm conducted a survey to determine the average amount of money consistent smokers spend…

A: We have given that,  Let X be a random variable from normal distribution with mean(μ) = 20 and…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A: Solution: Let X be the speed for a randomly selected car. From the given information, X follows…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A: b) Given that μ=71 and σ=9. Let X be the speed for a randomly selected car. The probability that it…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A:

Q: Based on a smartphone​ survey, assume that 51​% of adults with smartphones use them in theaters. In…

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 79 mph and…

A: Given observation Mean = 79 mph Standard deviation = 7 mph The distribution of x is Normal i.e. X ~…

Q: Assume that 25.6​% of people have sleepwalked. Assume that in a random sample of 1483 ​adults, 423…

A: Given, a) Population proportion = p = 0.256 sample size = n = 1483 sample proportion =

Q: Based on a smartphone survey, assume that 56% of adults with smartphones use them in theaters. In a…

A: Given information- We have given a problem of binomial distribution. We have given that 56% of…

Q: Based on a​ poll, among adults who regret getting​ tattoos, ​17% say that they were too young when…

A:

Q: An airline knows from experiences that the distribution of the number of suitcases that get lost…

A: Let "X" be the number of suitcases that get lost each week on a certain route.

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 71 mph and…

A:

Q: A national survey of 1600 adult citizens of a nation found that 22% dreaded Valentine's Day. The…

A:

Q: school conducted an IQ test to 32 randomly selected students. The standard deviation in the same…

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 76 mph and…

A: a. The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the…

Q: Based on a​ poll, among adults who regret getting​ tattoos, 23% say that they were too young when…

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: Based on a smartphone​ survey, assume that   42​% of adults with smartphones use them in theaters.…

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and…

A:

Q: uppose that the heights of female adults in the United States are normally distributed with a mean…

A: Solution-: Given: μ=65.4inches,σ=2.8inches We obtained the following: (a) P(X is between 66 and 70…

Q: Suppose you sample 2 students from every classroom where a class is being held at Duke University at…

A: Solution The distribution of the population is not given and sample size is not large to apply the…

Q: Given a normal population whose mean is 690 and whose standard deviation is 61, find each of the…

A: Answer The mean = 690The standard deviation = 61

Q: Assume that 35.4% of people have sleepwalked. Assume that in a random sample of 1490 ​adults, 565…

A: Given p=0.334 n=1490

Q: .What is the probability that exactly 20 of them used Google b. What is the probability that 15 or…

A: Let , X be the number of  Internet searches in a particular month used the Google search engine Here…

Q: Assume that for the population of all unemployed individuals in Minnesota, the population mean…

A:

Q: Given a normal population whose mean is 320 and whose standard deviation is 58, find each of the…

A: Given, Mean, μ = 320Standard deviation, σ = 58Let X be a random variable which represents the normal…

Q: Based on a smartphone survey, assume that 43% of adults with smartphones use them in theaters. In a…

A:

Q: Find the probability that the mean weight of a sample of 25 bookbags will exceed 7 pounds.

A: Here use central limit theorem and standard normal distribution table for probability from z score

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 79 mph and…

A: Given :μ=79σ=9X~N(μ=79,σ2=(9)2)

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.