An internet service provider sampled 540 customers and found that 75 of them had experienced an interruption in high-speed service during the previous month. Compute a 99% confidence interval for the proportion of customers who have experienced a service interruption during the previous month.

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: Given n=1750 X=436

Q: A poll of 827 students at Alpha State College found that 61% of those polled preferred a quarter…

A: Given that Sample size n = 827 Sample proportion of students who prefer a quarter system = 0.61 The…

Q: Suppose a consumer advocacy group wants to conduct a survey to find if the proportion of consumers…

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Q: A university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: A computer software magazine compares the rates of malware infection for computers protected by…

A: There are two independent samples which are software A and software B. Both samples are drawn from…

Q: A simple random sample of 300 branches out of a total of 1200 branches of a UK travel agency found…

A: Given : Here population is total branches of a UK travel agency  Population Size (N) = 1200 Sample…

Q: A university dean is interested in determining the proportion of students who receive some financial…

A: The point estimate=p^=118200=0.59n=sample size= 200z=critical value of 95% confidence…

Q: Out of a sample of 150 people who walked into a fast food restaurant, 135 said they prefer ketchup…

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Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A:

Q: In a random sample, 136 of 400 people given a flu vaccine experienced some discomfort. Construct a…

A: Given information n = 400 People No of people given vaccine x = 136

Q: In a survey of 612 randomly selected female college students, 141 report that they had been sexually…

A: Given Information:n=612x=141c=95%=0.95

Q: In an exit poll of 625 scientifically and randomly selected voters, 340 expressed support for…

A:

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: In a study of 150 randomly selected accidents that required treatment in an emergency room, 36%…

A:

Q: Determine from a confidence interval whether a test is significant?

A: Null hypothesis states that there is no difference between populations or a set of given…

Q: A sample of 200 lightbulbs was tested and it was found that 11 were defective. Calculate a 95%…

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Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community…

A: Given that, Out Of 380 randomly selected medical students, 21 said that they planned to work in a…

Q: Of 380 randomly selected medical​ students, 21 said that they planned to work in a rural community.…

A: Given that 380 randomly selected medical​ students, 21 said that they planned to work in a rural…

Q: in a survey of 499 randomly selected gun owners, it was found that 62 of them said they owned a gun…

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Q: 4. A market-research firm asked 300 people about their shampoo-purchasing habits. Fifty-five people…

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Q: Of 91 adults selected randomly from one town, 60 have health insurance. Find a 90% confidence…

A: From the provided information, Sample size (n) = 91 Out of which 60 have health insurance. Sample…

Q: Of 600 bags of rice randomly selected from a train after a wreck, 230 were damaged in the train…

A:

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: Givensample size(n)=150x=48p^=xn=48150p^=0.32confidence interval…

Q: It was observed that 30 of the 100 randomly selected students smoked. Find the confidence interval…

A: It is given that, 30 out of 100 randomly selected students smoked i.e. proportion of the student who…

Q: In a recent survey of 850 homeowners, 3 in 10 homeowners report having a home equity loan that he or…

A: From the provided information, Sample size (n) = 850 3 in 10 homeowners report having a home equity…

Q: A U.S. Travel Data Center survey of 500 adults found that 195 said they would take more vacations…

A: Solution: Let X be the number of adults who said that they will travel more this year and n be…

Q: In a random sample of 532 individuals, 78% stated they needed a laptop in order to work from home.…

A: Given that  n=532 , p=78%=0.78 99% confidence level

Q: In a survey conducted by a reputable marketing agency, 231 of 1000 adults 19 years of age or older…

A: Given Data Sample Size, n = 1000 Number of successes, x = 231.0 Significance…

Q: Out of 157 randomly selected adults in the United States who were surveyed, 77 exercise on a regular…

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Q: In a survey 800 randomly selected 16 to 18 years old living in USA were asked whether they have ever…

A:

Q: A random survey of 36 airline passengers indicates that twelve have never flown before. Find a 95%…

A: We have given that,  Sample size (n) = 36 and favorable cases         (X) = 12 Then,  We Will find…

Q: In a random sample of 100 drivers, 80 were using seat belts while driving. Construct a 95%…

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Q: A study was being done to estimate the proportion of students who receive financial aid. If the…

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Q: A Pew Research Center survey of 1,857 internet users found that 1,124 people agreed that online…

A: Given: CI=95% p^=11241875=0.599 n=1875

Q: ) In a Gallup poll, 1011 adults were asked if they consume alcoholic beverages and 64% of them said…

A: 11. Given information: The sample size is 1011 adults. 64% of them said that they did. That is,…

Q: Construct a 95% confidence interval for the population proportion of students who graduate within…

A: The sample size is n = 400 And the number of students who graduate within six years, X = 108 The…

Q: A researcher who was interested in knowing how many people in a city supported a new retirement plan…

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Q: According to a recent Government survey, 6% of all merchandise sold in the U.S. gets returned.  A…

A: It is given that sample size (n) is 80 and x is 12.

Q: In a sample of 95 recommendations, it is found that 56% of them made money. Determine the upper…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: Based on a sample of 1000 adult Americans, USA Today reported that 840 of them preferred cheese on…

A: Given that on a sample of 1000 adult Americans, USA Today reported that 840 of them preferred…

Q: Of 57 bank customers depositing a check, 25 received some cash back. Construct a 90 percent…

A:

Q: Of 41 bank customers depositing a check, 25 received some cash back. (a) Construct a 90 percent…

A: of 41 bank customers depositing a check, 25 received some cash back.x=25 and n=41now, p^=xn=2541for…

Q: Of 50 customers depositing a check, 17 received some cash back. Construct a 90 percent confidence…

A: We hav eto find 90% confidence interval....

Q: In a recent poll of 1200 randomly selected adult office workers, 32% said they had worn a Halloween…

A: From the given information, Consider, p = proportion of adults who said they had worn a Halloween to…

Q: In a certain state, a survey of 500 workers showed that 38% belonged to a union.  Find the 93%…

A: Computation of critical value: 1-α=0.93α=0.07α2=0.0351-α2=0.965 The critical value of z-distribution…

Q: Do younger people use Twitter more often than older people? In a random sample of 316 adult Internet…

A:

Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

A: Here we need to construct a 95% confidence interval for the population proportion. Here the sample…

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.