Samples Were Drawn from Three Populations $n _ { 1 } = 6 , n _ { 2 } = 7$

question 35

Multiple Choice

Samples were drawn from three populations. The sample sizes were $n _ { 1 } = 6 , n _ { 2 } = 7$ , and $n _ { 3 } = 9$ . The sample means were $\bar { x } _ { 1 } = 1.20 , \bar { x } _ { 2 } = 1.82$ , and $\bar { x } _ { 3 } = 1.51$ . The sample standard deviations were $s _ { 1 } = 0.32 , s _ { 2 } = 0.44$ , and $s _ { 3 } = 0.48$ . The grand mean is $\bar { x } = 1.524091$ . How many degrees of freedom are there for SSE.

• A) 3
• B) 18
• C) 2
• D) 19

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Definitions:

Tonsils

Masses of lymphoid tissue located at the back of the throat that help protect the body from infection and play a role in the immune system.

Antigenic Determinants

Specific parts of a molecule that are recognized by the immune system, critical for the specificity of immune responses.

Epitopes

Specific parts of an antigen that are recognized by the immune system, specifically by antibodies, B cells, or T cells.

Lymphocytes

A subtype of white blood cells involved in the immune response, including B cells, T cells, and natural killer cells.