# Should I use a t-test to compare the means?

So here are the basic facts:

My population is a city. The sample is 500. I am calculating how many minutes it takes by foot to walk to their nearest shop.

The participants are split into two groups: car users n= 210 and public transport users n=290. I want to see if the means differ between the groups.

Which test should I use?

If a t-test, should it be paired or unpaired?

• You've tagged your question with t-test, so you have an idea about where to start. What have you tried so far? Please check the community guidelines on how to ask a good question to increase your chances of getting an answer. Apr 8, 2017 at 16:51
• T-tests should be ok... - is your data normally distributed? Apr 8, 2017 at 16:53
• This is where i get confused. Like my range is approx 1-30. But i dont understand how I tell if my data is normally distributed? Also, would i be using a paired or unpaired t-test? Apr 8, 2017 at 16:56
• Tests shoud definitely be unpaired. Can you show us histograms? Walking time to closest shop doesnt sound a like a normal distribution (since it will be capped at zero ...), so maybe some nonparametric (rank) test, or bootstrapping. Apr 8, 2017 at 17:45