1. ## help solving

which of the following samples would have the smallest standard error?

a.n=100 scores from a population with o=20
b.n=25 scores from a population with o=10
c.n=25 scores from a population with o=20
d.n=100 scores from a population with o=10
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if sample of n=4 scores is obtained from a population with m=70 and o=12,then a sample mean of m=76 would corresponds to a z-score of ______?

a.z=1.00
b.z=2.00
c.z=0.50
d.z=0.25
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a sample of n=4 sores has the standard error o 12 what is the standard deviation of the population from which the sample was obtained?

a.48
b.6
c.24
d.3
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assuming that all other factors are held constant as the population variability increases the standard error will also increase ?

a.true
b.false
----------------------------------------------------------------------------------
for a normal population with a mean of u=80 and a standard deviation of o=10 what is the probability of obtaining a sample mean greater than m=75 for a sample of n=25 scores?

a.p=0.6915
b.p=0.3085
c.p=0.9938
d.p=0.0062

2. ## Re: help solving

FYI - this is not answers.yahoo.com

Are you able/willing to show some work? There are at most 2 steps for each of these.

3. ## Re: help solving

Originally Posted by noore
which of the following samples would have the smallest standard error?

a.n=100 scores from a population with o=20
b.n=25 scores from a population with o=10
c.n=25 scores from a population with o=20
d.n=100 scores from a population with o=10
---------------------------------------------------------------------------------
if sample of n=4 scores is obtained from a population with m=70 and o=12,then a sample mean of m=76 would corresponds to a z-score of ______?

a.z=1.00
b.z=2.00
c.z=0.50
d.z=0.25
------------------------------------------------------------------------------------
a sample of n=4 sores has the standard error o 12 what is the standard deviation of the population from which the sample was obtained?

a.48
b.6
c.24
d.3
-------------------------------------------------------------------------------------
assuming that all other factors are held constant as the population variability increases the standard error will also increase ?

a.true
b.false
----------------------------------------------------------------------------------
for a normal population with a mean of u=80 and a standard deviation of o=10 what is the probability of obtaining a sample mean greater than m=75 for a sample of n=25 scores?

a.p=0.6915
b.p=0.3085
c.p=0.9938
d.p=0.0062
Please don't post more than two questions in a thread. Otherwise the thread can get convoluted and difficult to follow. See rule #8: http://www.mathhelpforum.com/math-he...hp?do=vsarules.

Also, please show some effort. See rule #11: http://www.mathhelpforum.com/math-he...hp?do=vsarules. Post what you can do and make it clear where you are stuck.