Answer True or False. For each false statement,explain why the statement is false. I need the answercorrect and fast please.10. Assume the population variance of a random variable is known, but the population meanis not. When using a sample to estimate the population mean, if the sample size is doubledthen the variance of the distribution of the sample mean will be halved.

Here Given Population Variance is known but sample mean is not known

Answered: 10. Assume the population variance of a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Suppose that the City of Chicago is interested in potential revenues if they introduce a tolling station near O'Hare. Further suppose that the average time between cars is only 2.4 seconds; what is the variance of the distribution?
In a human population, the proportion of individuals with a certain disease is 0.10. if we select a sample of size 1000 from this population, determine the value of the variance of the sample proportion.
One sample has n=7 and SS=35 and a second sample has n =17 and SS =45. What is the pooled variance for these two samples?
How, in general, is the requirement of equal population variances to allow the use of analysis of variance method verified? a All three sample standard deviations must be equal. b The largest sample standard deviation is equal to the sum of the other standard deviations. c The largest sample standard deviation must be less than or equal to twice the smallest sample standard deviation. d The largest sample standard deviation is less than or equal to the variance of the smallest sample.
Experience has shown that a grade in MAT 2371 is normally distributed with mean 66 and variance 64. Assume that the grades are independent of each other. What proportion of the class will get a grade of at least 80? 0,5656 0.0401 0.5871 0.9599 0.4129
X is a random variable with mean X = 3, variance o = 2.
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 8 with variance 25 and an IRS from B of size 9 with variance 16. What is the resulting standard error estimate if we assume both populations have the same population variance?
When using analysis of variance , the calculated F statistic will decrease as A) the variability among the groups decreases relative to the variability within the groups.B) the total variability increases.C) the total variability decreases.D) the variability among the groups increases relative to the variability within the groups.
Suppose that we have disjoint normal populations A and B with equal but unknown population variances. Suppose we plan a sample of size 12 from from population A and a sample of size 6 from population B which we will pool to form the pooled variance. If the sample variance for the sample from population A is 25 and the sample variance for the sample from population B is 36, then what is the pooled sample variance?

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10. Assume the population variance of a random variable is known, but the population mean is not. When using a sample to estimate the population mean, if the sample size is doubled then the variance of the distribution of the sample mean will be halved.