Ask
your own question, for FREE!
Mathematics
24 Online
OpenStudy (anonymous):
Statistics question: Why is the z test for independent groups never used?
Still Need Help?
Join the QuestionCove community and study together with friends!
OpenStudy (anonymous):
Because a z test requires that the population standard deviation is known, which is almost never the case. Consequently, we use the t test for independent groups.
OpenStudy (anonymous):
Thank you Dino! I would have never got that from my text book.
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
jennurfavv:
...Lighter lights the spark but I look better in the dark...
Twaylor:
Any ideas on how to make this sound darker? https://splice.com/sounds/beatmaker/b
OsKar:
Any members from NJROTC, what's the hardest thing to do and why?? (Could relate t
MochaBerries:
some ?poetry? I wrote when I was in my feels, lol (don't attack me if this isn't proper poetry!!) __ "hypocrisy", iffat fatima on a cloudy summer [my birthd
zanesafoodie:
love is a poison the deadliest kind love is blind and yet it can still help you f
jennurfavv:
...Lighter lights the spark but I look better in the dark...
29 minutes ago
10 Replies
0 Medals
Twaylor:
Any ideas on how to make this sound darker? https://splice.com/sounds/beatmaker/b
1 hour ago
3 Replies
0 Medals
OsKar:
Any members from NJROTC, what's the hardest thing to do and why?? (Could relate t
2 hours ago
1 Reply
0 Medals
MochaBerries:
some ?poetry? I wrote when I was in my feels, lol (don't attack me if this isn't proper poetry!!) __ "hypocrisy", iffat fatima on a cloudy summer [my birthd
57 minutes ago
21 Replies
2 Medals
zanesafoodie:
love is a poison the deadliest kind love is blind and yet it can still help you f
1 hour ago
12 Replies
1 Medal