Hi, I need to perform a t-test to determine the relationship between US govt spending on Police and the number of Rapes annually.

So I have 53 data points (53 years each variable) Firstly, can I use a t-test for this data?

My first problem is that I don't get whether I should call this a one tailed or a two tailed t-test because I don't understand the difference between the two, I"m really bad at math so please bear with me I'd be glad if you tell me what to do, thanks in advance!

Following that, my other problem is labeling the cells in the contingency table. If I want to test the independence of the the US Govt spending on Police and the number of Rapes Annually, what would you suggest I name the columns and rows of the contingency table? (Basically names for the nominal variables/ the categories data can be classified into.)

Earlier I thought of Increase, Decrease and No change for Row(Govt. spending) and Columns(No. of rapes), but that gave me two problems:

The expected column totals weren't the same as the observed column totals

There were more expected values than observed values(observed values had some 0s)

What do I do? :S

Cheers

Kenshi

P.S. What other statistical tests can I use to test the relationship between the variables? ( I'd be immeasurable grateful if you could tell me this!! )

So I have 53 data points (53 years each variable) Firstly, can I use a t-test for this data?

My first problem is that I don't get whether I should call this a one tailed or a two tailed t-test because I don't understand the difference between the two, I"m really bad at math so please bear with me I'd be glad if you tell me what to do, thanks in advance!

Following that, my other problem is labeling the cells in the contingency table. If I want to test the independence of the the US Govt spending on Police and the number of Rapes Annually, what would you suggest I name the columns and rows of the contingency table? (Basically names for the nominal variables/ the categories data can be classified into.)

Earlier I thought of Increase, Decrease and No change for Row(Govt. spending) and Columns(No. of rapes), but that gave me two problems:

The expected column totals weren't the same as the observed column totals

There were more expected values than observed values(observed values had some 0s)

What do I do? :S

Cheers

Kenshi

P.S. What other statistical tests can I use to test the relationship between the variables? ( I'd be immeasurable grateful if you could tell me this!! )

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