What does the t-test measure?
A t-test is a type of inferential statistic used to determine if there is a significant difference between the means of two groups, which may be related in certain features. A t-test looks at the t-statistic, the t-distribution values, and the degrees of freedom to determine the statistical significance.
What is the difference between an independent t-test and a dependent t-test?
Dependent samples are paired measurements for one set of items. Independent samples are measurements made on two different sets of items. When you conduct a hypothesis test using two random samples, you must choose the type of test based on whether the samples are dependent or independent.
What does T dependent mean?
Protein antigens are called T-dependent antigens because they can only activate B cells with the cooperation of helper T cells. Other molecule classes do not require T cell cooperation and are called T-independent antigens.
What does it mean if the t test shows that the results are not statistically significant?
This means that the results are considered to be „statistically non-significant‟ if the analysis shows that differences as large as (or larger than) the observed difference would be expected to occur by chance more than one out of twenty times (p > 0.05).
What type of relationship does a dependent t-test assess?
The dependent t-test (also called the paired t-test or paired-samples t-test) compares the means of two related groups to determine whether there is a statistically significant difference between these means.
When should a dependent samples t-test be used?
The dependent sample t-test is used when the observations or cases in one sample are linked with the cases in the other sample. This is typically the case when repeated measures are taken, or when analyzing similar units or comparable specimen.
What do T cells do in the immune system?
T cells are a part of the immune system that focuses on specific foreign particles. Rather than generically attack any antigens, T cells circulate until they encounter their specific antigen. As such, T cells play a critical part in immunity to foreign substances.
What is an example of a dependent t-test?
For example, you could use a dependent t-test to understand whether there was a difference in smokers’ daily cigarette consumption before and after a 6 week hypnotherapy programme (i.e., your dependent variable would be “daily cigarette consumption”, and your two related groups would be the cigarette consumption values …
