Relationships

D07: Relationships – t-Tests

Start this discussion as soon as you’ve read the text/module info on the topic. Three posts are the minimum – one in response to my prompt below and at least two responses to the posts of other students. Use the discussion like a study group: Use your knowledge, practice, ask questions… Wrap up your discussion after participating for a few days -while you’re working on the worksheet and homework related to the topic – don’t wait too long since the next discussion opens pretty soon…

I have completed a number of t-tests using the following variables from the STUDENT survey.

For your first post:

Open the file and review the t-tests Download Open the file and review the t-teststhat are available and which are most interesting to you. 

Choose ONE of these sets of t-tests to discuss –   

Write out the research hypothesis (name the variables and say they are related) and the null hypothesis (name the variables and say that they are not related).

Find the calculated t on the printout.

Find or calculate the df (total N1+N2-2) and, using an alpha of 0.05, find the critical value of t (Table C in the book). Alternatively, you can use the significance (sig), compared to alpha. (Quick link to the videos that discuss these options.)

Make a decision about the null hypothesis – accept or reject.

Interpret your findings – is there a relationship between these two variables? If so, what is the nature of that relationship? (Refer to the means…) Speculate on why these findings might be as they are. Remember that the purpose of this discussion is to practice interpretation in your own words – what do these findings mean?For your Response Posts (at least two):
Read through the posts of other students and comment or respond to at least two different posts.You can interpret their data findings in your own words, suggest a correction (gently and supportively), comment on what you learned from their post (be specific), discuss surprising or enlightening information in the data, etc..Your goal is to use the statistics we are learning and own the language – say it in your own words – so that anyone could understand what we are learning about the variables from the statistics.Nominal/Ordinal (Independent) variables: Sex/Gender or PetInterval (Dependent) variables: Classes, or The number of times one eats per day, or Entertainment $ per week, or Height, or Work hours, or Study hours

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