Population mean?

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http://s304.photobucket.com/user/tyronneguillory57/media/mean_zpsgvihzpls.png.html?filters[user]=142571972&filters[recent]=1&sort=1&o=0

Question

Population mean?

Just copy and paste the whole link.

http://s304.photobucket.com/user/tyronneguillory57/media/mean_zpsgvihzpls.png.html?filters[user]=142571972&filters[recent]=1&sort=1&o=0

anonymous · Answer

@amistre64

amistre64 · Answer

is there sufficient data to calc the point estimater?

anonymous · Answer

I don't think. What about population mean?

amistre64 · Answer

tell me, where do we get a point estimator from?

anonymous · Answer

From the data that is given.

amistre64 · Answer

and since we have data given, we can determine a point estimator right?

what do we use from the sample to estimate the populations mean?

anonymous · Answer

I honestly don't know. From the answers it says we can find the population mean or the point estimate but not both.

amistre64 · Answer

the best point estimator for a population mean ... is the sample mean.

tell me why this is true .

amistre64 · Answer

we arent given any information on the population parameters ... so determing a specific value for it is just not a possibility.

all we have to go on is a sample of the population; which we expect to be representative of the population.

not equal to it, but with the same basic diversity ....

anonymous · Answer

So we won't be able to find the point estimate?

amistre64 · Answer

is there something preventing you from finding the sample mean?

anonymous · Answer

What is the sample mean?

anonymous · Answer

The sample is mean is 32.3.

amistre64 · Answer

i cant verify that simply because im not going to work it out.  but assuming youve done it correctly:

add up the values and divide by 40

then sure.

anonymous · Answer

Yes that is what I did. Is that number the point estimate or population mean?

amistre64 · Answer

did we get it from the sample?  or from the population?

anonymous · Answer

sample.

amistre64 · Answer

then is it a population parameter?  or an estimate using the sample data?

anonymous · Answer

I guess it would be an estimate.

amistre64 · Answer

no guessing needed :)  its an estimator using the samples data to approximate the populations data.

anonymous · Answer

so the first answer would be the correct choose?

amistre64 · Answer

assuming you did the sample mean correctly, then yes ;)

anonymous · Answer

ok. thank you

amistre64 · Answer

youre welcome