Question

I have an experimental group (TK El students) and a control group (non-TK El) students. My evaluation question is concerned with whether the TK program improves the language and literacy skills for English learner (El) students. I will conduct a t-test to determine the difference in means for students test scores.

a) Is the null hypothesis that "no difference exists between the mean scores for the experimental and control group" OR that "the TK program doesn't positively influence the skills of students"

b) If there is no difference in means, what does this suggest about the program?

c) when are means considered statistically significant?

Answer 1

A)

Null hypothesis means that there is no difference

So, here the null hypothesis is that "no difference exists between the mean scores for the experimental and control group"

That is

Null hypothesis Ho : u1-u2 = 0

B)

If there is no difference in the means

Then we fail to reject the null hypothesis

And we do not have enough evidence to support the claim that TK program improved the language and literacy skills for El students.

C)

When the obtained P-Value for the test is less than the given significance level

Then the result is statistically significant.