How do we know which test to use (t or z) in these type of questions?
#Confidence Intervals
shut juniper
wraith blazeBOT
How do we know which test to use (t or z) in these type of questions?
- Wait patiently for a helper to come along.
- Once someone helps you, say thank you and close the thread with:
+close
- Feel free to nominate the person for helper of the week in #helper-nominations
- Do not ping the mods, unless someone is breaking the rules.
- If you're happy with the help you got here, and the server overall, you can contribute financially as well:
visual crypt
How do we know which test to use (t or z) in these type of questions?
Well, n = 100 is quite large, so the normal approximation of Student's distribution won't be that bad.
shut juniper
So if n is larger than 30 we do a z test right?
visual crypt
So if n is larger than 30 we do a z test right?
Well, usually that works, yeah.
shut juniper
Well, n = 100 is quite large, so the normal approximation of Student's distribut...
do we do a t or z distribution here? The sample size is small so that indicates a t test. however the samples are from a z distribution, that indicates a z test. Can you help me
the solution applies t test btw