When to Use Which t-test?

When to Use Which t-test?

Nguyễn Ngọc VyHUF04 -

Research Scenario & Test Choice

In my study, I want to examine whether a new teaching method improves students’ English vocabulary scores. I divide participants into two ...

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Research Scenario & Test Choice

In my study, I want to examine whether a new teaching method improves students’ English vocabulary scores. I divide participants into two groups: one group uses the new method, while the other uses a traditional method.

The data come from two different groups of participants (each student is only in one group), and I will compare their test scores after the intervention.

Test Decision: Independent Samples t-test

I would use an independent samples t-test because:

There are two separate groups

The participants in each group are different individuals

I want to compare the mean scores between these two groups

This test is appropriate for determining whether the difference in mean scores between the two teaching methods is statistically significant.

When to Use Which t-test?

Nguyễn Trúc Thanh VyHUF04 -
Your scenario is clear and your choice of an independent samples t-test is appropriate given that you have two separate groups. I like how you clearly explained that the ...

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Your scenario is clear and your choice of an independent samples t-test is appropriate given that you have two separate groups. I like how you clearly explained that the participants are different, which justifies your test choice.

One suggestion is to mention whether the two groups are similar at the beginning (e.g., same proficiency level). If they are not equivalent, it might affect the validity of your comparison. You could also briefly note assumptions like normality or equal variances to strengthen your explanation.

Overall, your reasoning is logical and well presented.