The appropriate interval width for a random sample of 100 observations that fall between 50 and 250 is

Q: A rowing team consists of four rowers who weigh 152, 156, 160, and 164 pounds. Find all possible…

A: Weigh of four rowers in a rowing team is population . So the given population is :…

Q: Find the Zc value for a 92% confident interval when the sample sizes 27

A:

Q: A certain population is divided into five strata so that N1 = 2000, N2 = 2000, N3 = 1800, N4 = 1700,…

A: Given, N1 = 2000 N2 = 2000 N3 = 1800 N4 = 1700 N5 = 2500  these are strata   To determine,  How…

Q: Based on that, the required sample size to estimate the population mean is equal to?

A: It is given that Margin of error E = 4 Level of confidence = 95% Population SD = 29 The critical…

Q: IE students in University Y taking Physical Ergonomics class were tasked to accomplish their…

A: Given : Sample size = n = 25 mean = μ = 174.5 Standard deviation = σ = 6.9

Q: Construct the sampling distribution for the sample means.

A: A population is consisting of  1,2,3,4,5

Q: Define the concept of sampling error and explain why this phenomenon creates a problem to be…

A:

Q: A sociologist wants to know the proportion of adults with children under the age of 18 that eat…

A:

Q: According to a sports report, the time of finishers covering a certain distance is normally…

A: Solution: Let X be the time of finishers covering a certain distance. From the given information, X…

Q: In a random sample of 81 professional actors, it was found that 8 were extroverts. Let p represent…

A: Given  In a random sample of 81 professional actors, it was found that 8 were extroverts. Let p…

Q: Create two data sets from 7 numbers each where: *Both data sets have the same standard deviation…

A: Below is the Example

Q: If the sample has standard deviation 2.1, what is a reasonable approximation to the range of this…

A: It is given that the standard deviation of the data is 2.1.

Q: Given the sample −1, 10, 0, 11, add one more sample value that will neither change the mean nor the…

A:

Q: According to the CLT, the standard error A. decreases, gets smaller as the sample size n B.…

A: We have given that, According to the CLT, the standard error__as the sample size n __ We have to

Q: Suppose the mean number of people attending all 2017 Veterans Day celebrations held in Virginia is…

A: here given , Suppose the mean number of people attending all 2017 Veterans Day celebrations held in…

Q: Is the difference between the mean annual salaries of statisticians in Region 1 and Region 2 more…

A:

Q: A stratified random sample can be used to ensure underrepresented populations are represented in a…

A: Stratified random sampling with proportional allocation: Stratified random sampling is a method of…

Q: the population standard deviation is 15, how large a sample is necessary to have a standard error…

A: Given  Population standard deviations σ=15, standard error=se>8

Q: Draw all possible samples of size 2 with replacement from a population consisting of 2, 5, 6, 8, and…

A: Given We need to Draw all possible samples of size 2 with replacement from a population consisting…

Q: Give an example of computing an appropriate sample size using the length of the interval.

A: Solution : Formula for computing sample size using the length of interval is, n = Zα2σd2 where , σ =…

Q: If the population standard deviation is 10, how large a sample is necessary to have a standard error…

A: The population standard deviation is 10 and the standard error is less than 5 points.

Q: Suppose the true proportion of voters in the county who support a specific candidate is 0.61.…

A: The mean of the sampling distribution of the proportion is given by; μp=p The standard error of the…

Q: Given the six-element population 8, 12, 15, 18, 21, 27, 32 and 36. How many samples of size 2 can be…

A: Given N = 8 n = 2 The number of samples of size 2 that can be drawn without replacement from the…

Q: Suppose that the standard error for the sampling distribution of the mean of time spent on an App…

A: From the provided information, Standard deviation of sampling distribution = 10 minutes when sample…

Q: Participants selected 120 samples of size 3 from a population of 5 scores (0, 0, 0, 3, and 6) using…

A: Given data participants selected 120 samples of size 3 from a population of 5 scores using…

Q: A doctor believes that 80% of all patients having a particular disease will be fully recovered…

A: From the provided information, A doctor believes that 80% of all patients having a particular…

Q: What are the conditions to satisfy to conduct a one-sample t-test for the population mean

A: Determine the conditions that used to satisfy to conduct the one-sample t-test for the population…

Q: Can you... a) Create the distribution of sample means with n= 3 for the population 2, 4, 6, 8? b)…

A: Solution: Part a) The  population is given as (2, 4, 6, 8 ) and sample size is: n= 3 All possible…

Q: Consider a sample with data values of 27, 25,20,15,30,34,28, and 25. Compute the range,…

A: Introduction: Consider the arrangement of the given observations in an ascending order for the…

Q: Suppose a random sample of n = 36 observations is selected from a population with mean= 256 and…

A:

Q: Find the standard deviation using 2 methods. And identify it is a grouped data or ungrouped data

A: Solution To calculate the standard deviation firstly we will use mid point.

Q: The mean score on the exit examination for an urban high school is 66with a standard deviation of…

A: Given  μ=66, σ=6, n=9  We want to find the sample mean(x̄)

Q: The standard IQ test has a mean of 99, and a standard deviation of 16. We want to be 90% certain…

A: Given data,μ=99σ=16E=5Z-value at 90% Confidence is Zc=1.645n=?

Q: In a random sample for 56 professional actors, it was found that 46 were extrovert.let p represent…

A: Given that in a random sample for 56 professional actors, it was found that 46 were extrovert. i.e.…

Q: Samples are drawn from a population with mean 56 and standard deviation 23. Each sample has 8…

A: Given: Mean = μ = 56 Standard deviation= 23 n = 8

Q: A greenhouse in a tri-county area has kept track of its customers for the last several years and has…

A: Given that,   The mean of the sampling distribution is,

Q: Consider a random sample size of 100 drawn from a population with mean 50 and standard deviation 10.…

A: The mean is 50 and the standard deviation is 10.

Q: Find the standard deviation of the sampling distribution of sample means using the given…

A: Given,μ=55 , σ=10and n=4

Q: Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the -score for each of the…

A: In this context, the sample of 5 data values are given. It is appropriate to find z-score for sample…

Q: What is the standard deviation (sd) of the number of  cardinal birds observed?

A:

Q: A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm.…

A: The summary of statistics is, The type of test is two tailed test

Q: A marine biologist wants to estimate the average weight of a population of dolphins living in a…

A: Note: the options for the answers are not given. So, the answer is written in assumption. In order…

Q: A local credit card agency reported to the government that the unpaid balance for their customers…

A: Specify the number of customers must be randomly sample by an auditor to ensure that the central…

Q: When the sample size n is sufficiently large, the sampling distribution of the sample mean becomes…

A: We have to check the given statement whether it is true or not.

Q: The first unit of the sample is selected at random and then each subsequent unit is picked at a…

A: Systematic sampling - first unit is selected at random the next subsequent units selected according…

Q: The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of…

A: Given  mu=209 , sigma=37.8 , n=247 X~Normal(mu=209,sigma^2=37.8^2)

Q: Use Table, to draw a random sample (without replacement) of size 5 from a population of 24 units.

A:

Q: In cluster sampling, a population is divided into groups then (some) members of some randomly chosen…

A: Definition  Nominal data: Nominal data measure qualitative data and it is the name of variable.…

Q: If you want to construct a 90% confident interval for a population mean such that it is within a…

A: The confidence interval for the mean is given by :    CI = x¯ ± zα2 ×σn x¯ : sample mean σ :…

Q: What would be the mean of the sampling distribution of all possible sample means obtained from this…

A: Given: μ=5σ=4