Examlex
A sample is used to obtain a 95% confidence interval for the mean of a population.The confidence interval goes from 15 to 19.If the same sample had been used to test the null hypothesis that the mean of the population is equal to 18 versus the alternative hypothesis that the mean of the population differs from 18,the null hypothesis could be rejected at a level of significance of 0.05.
T-cells
A type of lymphocyte that plays a central role in cell-mediated immunity, distinguishing between self and non-self molecules.
Immune System
The body's defense mechanism against pathogens, comprising various cells, proteins, tissues, and organs.
Immune System
The body's defense mechanism against infectious organisms and other invaders through a combination of physical barriers, cells, and proteins.
Lymph Nodes
Small, bean-shaped structures that are part of the lymphatic system and function as filters for harmful substances.
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