Suppose that you want to determine the number of people who will attend a conference this year. In order to do so, you collect a simple random sample of 10 years and find a mean of 2350 attendees with a standard deviation of 485 attendees. Which kind of interval would you construct and why?

Q: Which of the following describes the sampling distribution of the sample mean?

A: Let , X→N(μ=1950 , σ=500) , n=100 By using central limit theorem , The sampling distribution of the…

Q: Find the probability that the sample mean is between 40 and 50. Sample size is 36 are drawn randomly…

A: From the provided information, Mean (µ) = 45 Standard deviation (σ) = 20 X~N (45, 20) Sample size…

Q: A social service agency plans to conduct a survey to determine the mean income of its clients. The…

A: Population standard deviation, Margin of error, No, we do not need an estimate of the current mean…

Q: During a wisdom teeth removal procedure, 1, 2, 3, or 4 wisdom teeth are removed, depending on the…

A:

Q: In a certain population, the mean price of the stock prices was 230, the median was 262, the…

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Q: The National Sleep Foundation surveyed representative samples of adults in six different countries…

A: we have given that  n1=250 ,n2=250 ,xbar1=391 ,xbar2=426 ,s1=20 ,s2=44 alpha=0.05

Q: Suppose that a category of world class runners are known to run a marathon (26 miles) in an average…

A: The random variable X is the average of the 49 races. The mean is 142, and standard deviation is 13.…

Q: Russell is doing some research before buying his first house. He is looking at two different areas…

A: Formula : CI=(x̄1 - x̄2) ± ME

Q: Jeff is doing an experiment involving mice. The mice weights have mean weight 3.68 ounces and…

A:

Q: n 1971, there was a shift in attitudes, as Americans’ “ideal” family switched from four kids to two…

A: The median would stay the same as it is not affected by outliers   The mean would increase as it is…

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given that:

Q: Suppose we have data on the ages of U.S. presidents. We also have ages for a sample of high school…

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Q: Suppose a statistics instructor believes that there is no significant difference between the mean…

A: Complete solution and answer is given in the image uploaded below  Thanks!

Q: Assume that 26% of students at a university wear glasses. Suppose 300 students are randomly…

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Q: Three potential employees took an aptitude test. Each person took a different version of the test.…

A: Step 1:First determine the z-score for three candidates by using the formula .z=σx−μ​where μ is the…

Q: A sample consists of the following n = 6 scores: -2, 7, 6, 4, 1, 3  Transform the original sample…

A: The question is about z score Given : Data : -2, 7, 6, 4, 1, 3 n = 6   To find : New value for the…

Q: A company wanted to determine the child care costs of its employees. A sample of 25 employees were…

A: Solution :  In above example a value of one of the sample change so we know that standard deviation,…

Q: The summary data from study demonstrates a stronger relationship between how many minutes per day a…

A: Given : A standard deviation is a measure of how dispersed the data is in relation to the mean. Low…

Q: Tim is a researcher who is dealing with a SAMPLE of scores.  The SAMPLE of scores is: 14, 16, 18,…

A: Given observation SAMPLE of scores is: 14, 16, 18, 13, 13, 19, 21, 11 n = 8

Q: imagine you’re hired by a beef company called “American Beef Makers” as a Data Analyst and you’re…

A: Please note that as per our guidelines if multiple sub-parts are there in a question we can answer…

Q: The following is a list of z-scores for two different IQ tests. The table on the LEFT is for an IQ…

A: Given that, The random variable X is the score of the IQ test. It is normally distributed.…

Q: Kelsey Matthau is an advisor for a high school. The high school offers a class for students…

A: The Given hypothesis test for the difference between two means of independent samples is…

Q: s known that o = 2.15 pounds. %3D sample should be taken to be 93% confident that the sample mean is…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: One sample has n = 5 scores and M = 10. A second sample has n = 20 scores and M = 5. If the two…

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Q: A social scientist asked a random sample of 50 students, "How many friends do you have on your…

A: From the regression output,Independent variable=number of friends on favourite social media…

Q: A population has a stand. dev. of 24. on average, how much difference should there be between the…

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Q: The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in…

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Q: community college Math instructor feels that the average number of units students enroll in each…

A: Hypothesis testing  Hypothesis testing is conducted for the parameters of the population like…

Q: A population of scores has a mean of ? = 35 and ? = 3.5. Find the z-scores that correspond to the…

A: Solution- Given that mean mu=35 and standard deviation s=3.5 Find Z score for corresponding X values…

Q: Suppose the  scores of students on an exam are normally distributed with a mean of 520 and a…

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Q: A researcher is interested in the mean mileage for all school buses in a school district. Forty…

A: Certainly! Let's break down each of these concepts clearly. 1. What is the population in the…

Q: During a wisdom teeth removal procedure, 1, 2, 3, or 4 wisdom teeth are removed, depending on the…

A: Central limit theorem As per the Central limit theorem, the sampling distribution of sample mean…

Q: Assume a standardized IQ test exists that possesses a normal distribution and has a mean score of…

A: Answer:- Given, Assume a standardized IQ test exists that possesses a normal distribution and has a…

Q: Adult Golden Retrievers have a mean weight of 64 pounds with a standard deviation of 8 pounds. If…

A: In this scenario, it is known that the  mean weight is 64 pounds with a corresponding standard…

Q: For many years, a large book publisher has published an expansive series of introductory science…

A: Population: In statistical enquiry our interest lies about gathering information about some…

Q: 2. Create a Frequency Distribution Table and compute for the Mean, Median, Mode, Variance, and…

A: Central tendency measure used to measure the average of location measure. There are five measures of…

Q: A population has a mean of 75 and a standard deviation of 15 you randomly sample nine people from…

A: Given population have mean 75 and standard deviation 15. A sample of 9 people from the population is…

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.