Posted by Tracy on Tuesday, February 5, 2013 at 10:05pm.
Usually you use z-tests when sample sizes are large (n is greater than
or equal to 30) whether or not you know the population standard deviation.
If you do not know the population standard deviation and have a small
sample (n < 30), then you can use t-tests.
Related Questions
hypothesis statistic - how a t Test can be employed in hypothesis testing by ...
Statistics - Discuss how a t Test can be employed in hypothesis testing by the ...
stat - If you test the (one sample) null hypothesis that the population ...
stat - Weinberger and Spotts compare the use of humor in television ads in the ...
statistic - A researcher conducts a t test for dependent means in which it is ...
HEEEEEEELP - HI I have no idea what's Alternative energy source . Can anyone...
Statistics - A study was conducted to investigate relationships between ...
statistics - use technology to find the P-value for a right-tailed test with n=...
STAT - If ì1 and ì2 represent the mean depression score for male ...
Statistic - A distribution has a standard deviation of ó = 9.5. Find the ...
For Further Reading
