When Using a T Table,the Degrees of Freedom Used for a T

question 37

Multiple Choice

When using a t table,the degrees of freedom used for a t test for independent means is

• A)the degrees of freedom for sample 1,divided by the sum of the degrees of freedom for both samples.
• B)the average of the degrees of freedom for the two samples.
• C)the sum of the two sample sizes,minus one.
• D)the sum of the degrees of freedom for the two samples.

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Definitions:

Piston

A cylindrical component that moves up and down in an engine's cylinder, converting combustion energy into mechanical motion.

Compress

To apply pressure to something or reduce its volume by squeezing it tightly, often referring to gases, fluids, or solids in various contexts.

Cylinder

A fundamental component of engines where fuel combustion occurs, generating power; it’s typically cylindrical in shape.

Pressure Differential Valve

A valve in a dual-circuit hydraulic brake system that closes off one circuit in response to a leak in order to maintain hydraulic pressure in the other circuit. Preserves brake pressure at two of the four wheels.