A population has a mean u = 86 and a standard deviation o = 28. Find the mean and standard deviation of a sampling distribution of sample means with sample size n= 49. ... H; = (Simplify your answer.) 0; = (Simplify your answer.)

Q: Calculate the sample standard deviation of the data shown. Round to two decimal places. X 23 29 11…

A: Given data is x={23,29,11,13,28,22,27,25}sample size(n)=8

Q: A consultant has three sources of income—from teaching short courses, from selling computer…

A: Given: Let X1, X2, X3 be independent  sources of income .…

Q: The proportion of men who smoke cigarettes in the US is 0.23.  A researcher took a sample of 200 men…

A: Sampling Distribution of Proportion: Standard deviation of sampling distribution of sample…

Q: A population has a bell-shaped distribution with a mean of 90 and a standard deviation of 8. Which…

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Q: When n 2 30 and the population standard deviation is not known, what is the appropriate…

A: Given : n≥30 population standard deviation is not known.

Q: A simple random sample of 100 observations was taken from a large population (N > 10,000). The…

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Q: Let X denote the lifespan for a randomly selected fly. Suppose the mean and the standard deviation…

A: let X: the lifespan for a randomly selected fly  and mean of X=E(X)=μ=25 days    standard deviation…

Q: Calculate the sample standard deviation of the data shown. Round to two decimal places. 21 15 25 17…

A: Given data set: 21, 15, 25, 17, 24, 30 Number of observations = 6

Q: From a normally distributed population, we took a simple random sample of 700 students with a mean…

A: Sample size n=700 Sample mean x¯=640 Population Standard deviation σ=300

Q: The variance of a data set is 10. What is the standard deviation of the data set? O 10 O 3.16 O 100…

A: We can find the standard deviation as below

Q: Calculate the standard deviation of the data shown, to two decimal places 16.1 18.5 19.3 14.4 3.9…

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Q: Which of the following is the correct formula for the margin of error of a population mean where the…

A: Margin of error: A margin of error is a statistical measurement for the diff. between actual and…

Q: Suppose a population of individuals has a mean weight of 160 pounds, with a population standard…

A: Solution: Let X be the weight of individuals. From the given information, X follows normal…

Q: (d) If the sample size is n= 16, what is the standard deviation of the population from which the…

A: Using central limit theorem.

Q: Breathing rates for humans can be as low as 4 breaths per minute or as high as 70 or 75 for a person…

A: (a) Obtain the fraction of all students would have breathing rates in the interval from 9.7 to 14.3…

Q: In a dependent sample t-test, you calculate the standard deviation for the  a) difference scores b)…

A: In this we have to tell that, for what values we calculate the standard deviation while using the…

Q: The proportion of a population with a characteristic of interest is p=0.37. Find the mean and…

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Q: If a product has a mean demand of 80 with a standard deviation of 10, if the customer holds 100…

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Q: The price-earnings (PE) ratios of a sample of stocks have a mean value of 14.5 and a standard…

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Q: Find the (a) mean, (b)median, (c) mode, (d) midrange, and (e) range (f) the standard deviation using…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: With individual lines at the checkouts, a store manager finds that the standard deviation for the…

A: Here, the data is based on the waiting time. Hence, only one population is involved in the study.…

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: We have, the population mean, μ=100                the standard deviation, σ=15 Let X=IQ score

Q: If a sample mean is 1,200 and the sample standard deviation is 350, determine the standardized value…

A: The standardized value corresponding to a score of x is, (x - x̄)/s, where x̄ is the sample mean and…

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

Q: The IQs of applicants to a certain college are approximately normally distributed with a mean of 112…

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Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 144 and a standard…

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Q: Sample A: 10, 20, 30 Sample B: 80, 90, 100 Sample C: 1,095; 1,105; 1,115     (a) Find the mean and…

A: Given:         Sample A:10, 20, 30        Sample B:80, 90, 100        Sample C:1,095; 1,105; 1,115…

Q: Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤ 47)? OA.…

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Q: What symbol is used for the standard deviation of a population? O a. X-bar O b.H O C. S O d. o

A: Standard deviation: The positive square root of the mean square of the deviations taken from the…

Q: The standard deviation of a sample is inversely proportional to the square root of its sample size.…

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Q: The standard deviation of the given data is A. 1.4495 B. 1.4597 C. 2.1011 D. 2.1307

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Q: Let ?̅ be the mean of a random sample of size 65 drawn from a population with a mean of 75 and a…

A: Solution-: Let, X= be the random variable Given: μ=75,σ=19,n=65 We find, (a) Mean of  X¯=? and…

Q: An audit finds that the dollar amounts of invoices have a mean of $1,662 and a standard deviation of…

A: we have given that mu=1662 ,sigma =302 , n=50  X~N(mu=1662 , sigma^2=302^2) X is a normally…

Q: The price-earnings (PE) ratios of a sample of stocks have a mean value of 12.75 and a standard…

A:

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 144 and a standard…

A:

Q: Calculate the standard deviation of the data shown, to two decimal places 6.3 28.2 24.9 23.7 5.7 2.7…

A:

Q: The starting salaries of individuals with an MBA degree are normally distributed with a mean of…

A: Given information- Population mean, µ = $40,000 Population standard deviation, σ = $5,000 We have to…

Q: The standard deviation of the given the data {14, 13, 16, 9, 3} is +

A: As per our guidelines we are suppose to answer only o ne question1)Given data set14,13,16,9,3sample…

Q: A distribution has mean 100 and standard deviation 3. What is the largest percent of the data that…

A: Given: Formula:

Q: Calculate the standard deviation of the data shown, to two decimal places 14 10.2 15.8 20.6 6.9 5.9

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Q: The deviation of the largest observation in the sample from the sample mean is,

A: Here given  A random sample of patients visiting a hospital emergency room was obtained and the…

Q: A population has a mean of 75 and a standard deviation of 8. A random sample of 800 is selected. The…

A: Given that the population has mean 75 and SD 8. A random sample of size 800 is selected. The sample…

Q: the standard deviation of a sample of 50 observations equals 10. the variance of the sample equals?…

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Q: Assuming that a population is normally distributed, then about 75% of sample means drawn from this…

A: Let about 75% of the sample means drawn from the normal population will lie within k standard…

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 116 and a standard…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

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Q: Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample…

A: Given,mean(μ)=180standard deviation(σ)=25sample size (n)=100

Q: The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size…

A: The standard error of mean is, SE = σ/√n, where σ is the standard deviation and n is the sample…

Q: Which of the following is the correct formula for the margin of error of a population mean where the…

A: Introduction: It is required to identify the margin of error of a population mean for unknown…

Q: By studying the standard deviation fomula, given below, explain why the standard deviation of a set…

A: Option (C) The values of x-x is always greater than  or equal to 0. This is the correct answer…