How do you find the p-value from a negative T score?

If you have found a negative t value (t<0 ): Multiply the t value you found by -1 (since the table only works with positive t values), resulting in a positive value tpos. Find the row with the appropriate number of degrees of freedom (df)

What does a negative t-value indicate?

Find a t-value by dividing the difference between group means by the standard error of difference between the groups. A negative t-value indicates a reversal in the directionality of the effect, which has no bearing on the significance of the difference between groups.

Can you have a negative t test value?

The “student’s” t distribution is symmetrical about t=0 and the space of the sampling distribution covers the entire real number line; that is, from minus infinity to plus infinity. Therefore t can be negative.

How do t values relate to p values?

The larger the absolute value of the t-value, the smaller the p-value, and the greater the evidence against the null hypothesis.

How do you interpret t test results?

Higher values of the t-value, also called t-score, indicate that a large difference exists between the two sample sets. The smaller the t-value, the more similarity exists between the two sample sets. A large t-score indicates that the groups are different. A small t-score indicates that the groups are similar.

How do you know if t-value is significant?

So if your sample size is big enough you can say that a t value is significant if the absolute t value is higher or equal to 1.96, meaning |t|≥1.96.

What does p-value and t-value mean?

Report Ad. For each test, the t-value is a way to quantify the difference between the population means and the p-value is the probability of obtaining a t-value with an absolute value at least as large as the one we actually observed in the sample data if the null hypothesis is actually true.