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how do you find point estimate for standard deviation?
1) The dashes are only here to keep the chart lined up. I posted this before and it didnt line up correctly.
2) Hopefully you're familiar with X bar. The three Xs have the bar (_) symbol above them. Hope this helps!
Make Chart First=
-----------------------(_)---------------(_)--------------(_)
--------xi--------------x------------ (xi-x)------------(xi-x)2
-------25-------------34--------------(-9)---------------81
-------32-------------34--------------(-2)----------------4
-------26-------------34--------------(-8)---------------64
-------40-------------34---------------6-----------------36
-------50-------------34--------------16---------------256
-------54-------------34--------------20----------------400
-------22-------------34-------------(-12)--------------144
-------23-------------34-------------(-11)-------------121
Total= 272--------------------Total= 0----- Total= 1106
Point estimate standard deviation of population :
The square root of:
*1106/ 8-1=
1106/7=
The square root of 158= 12.56980508997653471
* I do not know how to show the square root on here but for the equation the number of sample is variable n. For the bottom of the division problem it is (n-1), which makes it 8-1=7
So the point estimate standard deviation of population is 12.56980508997653471
What else can I help you with?
What is the statistic that is used to estimate a population standard deviation?
the sample standard deviation
What happens if you estimate population standard deviation with the sample standard deviation?
Not a lot. After all, the sample sd is an estimate for the population sd.
How do i find sample standard deviation from population standard deviation?
If the population standard deviation is sigma, then the estimate for the sample standard error for a sample of size n, is s = sigma*sqrt[n/(n-1)]
How does one calculate the standard error of the sample mean?
Standard error of the sample mean is calculated dividing the the sample estimate of population standard deviation ("sample standard deviation") by the square root of sample size.
Standard deviation considered a crude measure of variance?
No. Well not exactly. The square of the standard deviation of a sample, when squared (s2) is an unbiased estimate of the variance of the population. I would not call it crude, but just an estimate. An estimate is an approximate value of the parameter of the population you would like to know (estimand) which in this case is the variance.
What does the sample standard deviation best estimate?
The standard deviation of the population. the standard deviation of the population.
What is the statistic that is used to estimate a population standard deviation?
the sample standard deviation
What happens if you estimate population standard deviation with the sample standard deviation?
Not a lot. After all, the sample sd is an estimate for the population sd.
How do i find sample standard deviation from population standard deviation?
If the population standard deviation is sigma, then the estimate for the sample standard error for a sample of size n, is s = sigma*sqrt[n/(n-1)]
Is standard deviation same as standard error?
From what ive gathered standard error is how relative to the population some data is, such as how relative an answer is to men or to women. The lower the standard error the more meaningful to the population the data is. Standard deviation is how different sets of data vary between each other, sort of like the mean. * * * * * Not true! Standard deviation is a property of the whole population or distribution. Standard error applies to a sample taken from the population and is an estimate for the standard deviation.
Can a standard deviation of a sample be equal to a standard deviation of a population?
Yes
Is population standard deviation the same thing as absolute standard deviation?
No.
How does one calculate the standard error of the sample mean?
Standard error of the sample mean is calculated dividing the the sample estimate of population standard deviation ("sample standard deviation") by the square root of sample size.
What is the standard deviation of 157 160 161 172 165 149?
The standard deviation if the data is a sample from a population is 7.7115; if it is the population the standard deviation is 7.0396.
Standard deviation considered a crude measure of variance?
No. Well not exactly. The square of the standard deviation of a sample, when squared (s2) is an unbiased estimate of the variance of the population. I would not call it crude, but just an estimate. An estimate is an approximate value of the parameter of the population you would like to know (estimand) which in this case is the variance.
What is the standard deviation of height in the US population?
The standard deviation of height in the US population is approximately 3 inches.
The standard deviation of the distribution of means is also known as the population standard deviation?
Yes.
