a simlpe random sample of 8 college freshmen were asked how many hours of sleep they typically got per night.  The results were 6,8.5,7.5,6.5,9,8.5,8,24. Eliminate the outlier, then construct a 95% confidence interval for the mean amunt of sleep from the remaining values.

Q: 3- Car and Driver Magazine tested a random sample of 9 hybrid cars and found their MPG to be 42, 51,…

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Q: In a random sample on 200 airline passengers, 84 said they would like a window seat. What is the…

A: 1. The point estimate for the proportion of passengers wishing a window seat is, p^=xn=84200=0.42…

Q: There are 3000 beads of various colors in a jar. In a sample of 125 beads, 40% were red. Calculate…

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Q: Suppose a different police department says their SRS resulted in a 95% confidence interval of 10.1%…

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Q: A 20-minute consumer survey mailed to 500 adults aged 25 to 34 included a $5 Starbucks gift…

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Q: Lindsey selected a random sample of 25 tomatoes at the farmer's market. The 95% confidence interval…

A: When Lindsey selected a random sample of 25 tomatoes at the farmer's market, she was aiming to…

Q: A technician randomly sampled repair logs for computers at a university. He wanted to find out how…

A: It is given that the proportion of computers that were repaired more than three times in the last…

Q: In a survey of 1005 adults 526 stated construct a 95% confidence interval

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Q: Cameron and Bailey each take random samples and construct 90% confidence intervals for the…

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Q: In a survey, 45 people were asked how much they spent on their last partners birthday gift. The…

A: Given information- Sample size, n = 45 Significance level, α = 0.10 Sample mean, x-bar = $90 Sample…

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

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

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

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Q: A random sample of 40 home theater systems has a mean price of $500 and a standard deviation of $60.…

A: Construct the 99% confidence interval for the population mean The 99% confidence interval for the…

Q: A large container contains colored beads. A simple random sample of beads yielded 107 red beads and…

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Q: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: A market researched for a consumer electronics company wants to study the television viewing habits…

A: Given: n=40x¯=15.3S=3.8 Degrees of freedom: df=n-1=40-1=39 The critical-value is obtained by using…

Q: the following random sample was selected from a normal distribution: 11, 16, 3, 13, 18, 18, 16, 19,…

A: Given data is11, 16, 3, 13, 18, 18, 16, 19, 17, 11sample size(n)=10

Q: I asked 45 randomly selected WSU college students how many US states they had visited. The students'…

A: The sample size is 45, sample mean is 3.8 and standard deviation is 1.5. The degrees of freedom is,…

Q: Of 2019 employees selected randomly at a company, 10% of them commute by carpooling. Construct a 90%…

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Q: When 328 college students are randomly selected and surveyed, it is found that 122 own a car. Find…

A: We want to find 95% CI for population proportion (p)

Q: A sample of 421 adults showed that 239 of them are connected to the Internet from home.  Construct…

A: From the provided information, Sample size (n) = 421 From which 239 are connected to the Internet…

Q: You receive a brochure from a large university. The brochure indicates that the mean class size for​…

A: Sample size is, Population mean is Confidence Level is The objective is to test the claim that the…

Q: What is the 95% confidence interval for the slope? The table contains a random sample of seven…

A: The table contains a random sample of seven skyscrapers in Chicago. Let x=number of stories And…

Q: Suppose a marketing company computed a 96% confidence interval for the true proportion of customers…

A: The objective of the question is to understand the meaning of the given 96% confidence interval for…

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

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Q: An arborist is interested in determining the mean diameter (in centimeters) of mature white oak…

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Q: company manufactures a certain over-the-counter drug. The company samples 80 pills and finds that…

A: We have given that  Sample size n = 80 Sample mean = 325.5 Standard deviation s=10.3 90%confidence…

Q: poll reported that only 645 out of a total of 2029 adults in a particular region said they had a​…

A: According to the given information in this question We need to construct 80% confidence interval

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.