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What test should I use in order to find out if two averages are statistically different from each other?
For a survey I did, I asked people to rate from 1 to 5 how much they spoke about a specific subject. I asked people from two different countries. The average from country A was 2.27 and the average from country B was 1.69
What test should I use in order to see if there is a statistical difference between the two averages?
Let me know if I need to provide more information. Thank you!
Statistically significant difference, excuse me
Would I need to use a t-test?
1 Answer
- ?Lv 68 years agoFavorite Answer
For t-test, both populations have to be normal, can assume independence, unknown population variances.
Even that, if it involves large sample sizes, go for z-test.
Else, population variances are known, and/or large n's, z-test.
Need to provide at least both n's and both sample standard deviations.