Suppose (as is roughly true) about 30% of all adult Internet users have posted videos online. A sample survey interviews an SRS of 1555 Internet users. (a) What is the actual distribution of the number X in the sample who have posted videos online? (b) Use software to find the exact probability that 450 or fewer of the people in the sample have posted videos online.

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Q: Data was collected from a simple random sample of 200 cell phone users age 18 or older in the United…

A: Introduction: It is of interest to test if the age-group of a person and whether or not they use…

Q: There were 20 multiple choice questions on Exam 2. The probability of getting the right answer on…

A: Given Information: n=20p=25%=0.25To find out the probability that a student who did not study would…

Q: #of Occupants 1 2 3 0.70 0.15 0.10 0.03 0.02 What is the mean number of occupants in a vehicle? 45…

A: given data, here data table and their probabilities are given we have to find out the mean for the…

Q: Forty percent of students at small colleges have brought their own personal computers to campus. A…

A: Given data: P = 0.40 Sample size (n) = 120

Q: What is mean and variance of the probability distribution?

A:

Q: In an certain species of newt, offspring are born either green or black. Suppose that 45% of these…

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Q: The average height of all the workers in a hospital is known to be 66.7 inches with a standard…

A: Let  X be the random variable from normal distribution with mean (μ) = 66.7, standard deviation (σ)…

Q: Twenty-three percent of U.S. employees who are late for work blame oversleeping. You randomly select…

A: According to the given information in this questionWe need to find the meanOf the binomial…

Q: A recent survey reported that 47​% of​ 18- to​ 29-year-olds in a certain country own tablets. Use…

A: According to the given information,Probability of success, p = 47% = 0.47Number of trials, n = 6Let…

Q: A company takes a random sample of 60 salespeople and measures the yearly average amount of money…

A: Given that the overall average amount for the company is $500,000 with a standard deviation of…

Q: (c) Describe the sampling distribution of p, the proportion of people who are satisfied with the way…

A: From the given data fill the blanks given

Q: 20% of men in a certain community are more than 6 ft tall. An anthropologist samples 5 men from a…

A: The binomial dist. is a discrete prob. dist.

Q: About 10% of the population has a particular genetic mutation. 900 people are randomly selected.…

A: Obtain the mean for the number of people with the genetic mutation in such groups of 900. The mean…

Q: According to a health​ publication, 12.8​% of persons under the age of 65 have no health insurance…

A: a. The binomial probability distribution is, PX=x=nxpx1-pn-x In the formula, n denotes the number of…

Q: Genetic theory indicates that the probability that a Dame's Rocket (flowering herbaceous plant) has…

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

Q: According to the University bookstore records, 60% of the students purchase a hard copy of…

A: Here, Significance level not given, if not given consider it 0.05 (5%)

Q: Suppose that the speeds of drivers on a certain road are normally distributed, with μ-33.8 mph and…

A: According to the given information in this question We need to answer two parts

Q: The average stock price for a company is $30, and the variance is 67.24. Assume that the stock…

A: It is assumed that the stock prices follow normal distribution. The mean stock price is $30 and…

Q: each score in a random sampling distribution represents what

A: We have given that  We have to define each score in a random sampling distribution :

Q: Suppose that the daily intake an adult follows a uniform distribution from 40 to 65 micrograms.…

A:

Q: A population proportion is p = 0.72. A random sample of size n = 50 will be taken and the sample…

A: Given ,Population proportion , p = 0.72 Sample size , n = 50And , the sample proportion  will be…

Q: Given that the mean weight of schoolchildren's book bags is 17.5 pounds, with a standard variation…

A: We have given that Population mean = 17.5 Standard deviation = 2.2 Sample size n =30

Q: In an certain species of newt, offspring are born either green or black. Suppose that 50% of these…

A: Here sampling distribution of proportion is normal because sample size is too large

Q: A recent survey reported that 47​% of​ 18- to​ 29-year-olds in a certain country own tablets. Use…

A:

Q: In a communication network, messages are received one at a time and checked for errors. It is known…

A: Note: Hi, there! Since, the multiple subparts are posted, we are solving first three subparts for…

Q: Determine the probability distribution for the​ number, X, who have no health insurance coverage. b.…

A: According to health publication, 17.3% of persons under age of 65 have no health insurance coverage.…

Q: In a country, a day can be either rainy or sunny. The probability of a day being rainy is 40.0% .…

A: In question, Given that In a country, a day can be either rainy or sunny. The probability of a day…

Q: A recent survey reported that 50​% of​ 18- to​ 29-year-olds in a certain country own tablets. What…

A:

Q: From a batch of bushings made per shift by a turner, 10 pieces are randomly selected for control.…

A: Total pieces is 30, 25 are first grade and 5 are second grade. A random sample of 10 is selected.

Q: Suppose that the true proportion of households with at least one car is T = .80. If a random sample…

A: Assume that π as the true proportion of households with at least one car.

Q: Employers want to know which days of the week employees are absent in a five- day work week. Most…

A: The question is about categorical data analysis.Given :To find :Test that the highest no. of…

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

A:

Q: Which of the following are the values of the chi-square statistic and P-value?

A:

Q: a) Clothes manufacturing machine, the probability of appearing damaged products is 0.02. At the…

A: Provided information is, For cloths manufacturing machine, the probability of appearing damaged…

Q: On a recent Saturday, a total of 1,054 people visited a local library. Of these people, 262 were…

A: Total No. of people visited a local library=1054No. of people were under age 10=262No. of people…

Q: 84 tires in a factory are tested for defectiveness. 12% of tires made in the factory are defective.…

A: From the provided information, Sample size (n) = 84 tires 12% of tires made in the factory are…

Q: Are mothers having their first child at an older age? The average age of a random sample of 36…

A: The z-test Two- Sample for means tool runs a two sample z-test means with known variances to test…

Q: he number of accidents that occur at a busy intersection is Poisson distributed with a mean of 4 per…

A: Given,  number of accidents per week (lamda)=4   Poission distribution is P(X=x)=e-lamda*lamdaxx!

Q: The table shows the estimated distribution of injury severity by child passenger. What is the…

A: Given data: Injury severity <1 Year 1 to 3 Years 4 to 7 Years Row total No injury 545786…

Q: Toss five fair coins and let x equal the number of heads observed. a. Identify the sample points…

A: toss five fair coins.  n = 5x = no. of heads observed. P(head) = p = 12P(x=X) =nCxpxqn-x…

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.