Suppose that we have disjoint normal populations A and B and we want to find the standard error estimate for estimating the difference in their means.  We have an IRS from A of size 16 with variance 25 and an IRS from B of size 6 with variance 36.  What is the resulting standard error estimate if we assume both populations have the same population variance?

Q: When trying to establish a good estimator it is essential to take into account the estimator…

A: : condition of good estimator I. The estimator must be biased.II. The estimator must have a…

Q: If sum of squares of deviation from the mean =20  and sample variance is 5  then the  number of…

A: Given, sum of squares=20 variance=5 number of observations=?

Q: If the coefficient of variation of the data = 40 % , the variance = 100 , then the mean of these…

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A: Given information, n=41x¯=107s=9000=94.8683μ=120

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A:

Q: A set of 5 scores has SS = 20. If the scores are from a sample, the sample variance is the…

A: The population variance is σ2 = SS/N, where SS is the sum of squared deviation scores and N is the…

Q: If an analysis of variance is used for the following data, what would be the effect of changing the…

A: The given sample data is as follows: M1 = 10, M2 = 20, SS1 = 90, and SS2 = 70. The value of M2 is…

Q: to population variance, we get an estimate of the sample variance by ① . This is known as ② . This…

A: Population Mean and Variance μ = 1n∑i=1nxiσ2 =1n∑i=1nxi-μ2 Sample mean and variance x¯=1N∑i=1Nxi…

Q: We would like to compare samples from two different populations A and B. The means of these two…

A: Given that, MuA= 200 MuB= 200 Var(A) = 72 Var(B) = 200 Sample size, nA = 36  nb= 100 We've to find…

Q: The homogeneity of variance assumption states that the two population variances are equal. Question…

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A: We have to find corrcet answer.

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A: The given sample observations for spent time (in minutes) by 30 male students is: The given sample…

Q: How do you find the standard error estimate of two disjoint populations, assuming they have the same…

A:

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

A:

Q: Suppose that we have disjoint normal populations A and B and we want to find the standard error…

A: Formula to find standard error when population variances are same : SE =sp 1n1+1n2 Where , sp  is…

Q: An economist wants to test if there is any difference in income between Escambia county and…

A: From the provided information,

Q: Suppose you know that the population variance for the weight of tractors is 4,000,000. What sample…

A:

Q: One of the major advantages of a repeated-measures design is that it removes individual differences…

A: Solution:

Q: For a population that is normally distributed with a very large population size compared to the…

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Q: Which of the following data sets would have the smallest variance?       700      701      702…

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Q: Suppose the variance of X is 33. What is the variance of .23X?

A: Given,Var(X)=33 we know that Var(ax)=a2Var(X)

Q: 24. If an analysis of variance is used for the following data, what would be the effect of changing…

A: 24. The formula for sum of squares within(Error) is SSwithin=∑SSi. When the value of SS2 changing…

Q: Based on the information provided: 1. Calculate a point estimate for the true population average…

A: Ans.   Here  it is given that ,   Sample Size = n = 64                      and average unemployment…

Q: if the standard deviation of a sample is 0.5 find the variance

A:

Q: In the formula for an analysis of variance, we want between-group variance to be and within group…

A:

Q: Consider a sample with data values of 2, 4, and 6. What is the variance?     1     2     3…

A: XX2204416636sum: 1256

Q: Suppose you want to know the variance of the weights of the only 6 Snakes in a particular 200. You…

A: Given: A table: Weight Difference from the mean X-μ (Difference from the mean)2 X-μ2 8.3 -0.5…

Q: If an analysis of variance is used for the following data, what would be the effect of changing the…

A: F-ratio is interpreted as the ratio of mean sum of squares between and mean sum of squares within.…

Q: If C.V.=6.8 and variance is 4.36141 then mean = a. 30.7117 b. 64.138 c. 641.38 d. 307.117

A: Given,C.V=6.8variance (σ2)=4.36141

Q: If two samples are selected from the same population, under which circumstances will the two samples…

A: Given that, The two samples are selected from the same population.

Q: If the errors produced by a forecasting method for 3 observations are +3, +3, and −3, then what is…

A:

Q: The difference between a sample mean and its parameter is called: a. sampling error b. a biased…

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Q: What is assumed by the homogeneity of variance assumption? Question 11 options: The two samples have…

A: The objective is to derive the assumption under "homogeneity of variance". The homogeneity of…

Q: We want to compare two population variances and draw a sample from each population for this purpose.

A: The two population variances are to be compared and sample from each population are drawn for this…

Q: Which of the following sets of data would produce the largest value for Cohen’s d if the difference…

A: Given that, the difference between the samples is 5 points.

Q: Are nursing salaries in City A lower than those in City B? As reported by a newspaper, salary data…

A: From the provided information,

Q: 1.For a symmetric data set with a mean of 11 and a variance of 25, approximately 68% of the values…

A: Solution: Given information: μ= 11  Population mean σ2= 25  Population variance σ= σ2σ=25σ= 5…

Q: Indicate the mean and the standard deviation of the distribution of means for each of the following…

A: We have to find mean and the standard deviation of the distribution of means for given situations.So…

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.