The Expected Value of the Difference of Two Sample Means

question 35

Multiple Choice

The expected value of the difference of two sample means equals the difference of the corresponding population means:

• A)only if the populations are normally distributed.
• B)only if the samples are independent.
• C)only if the populations are approximately normal and the sample sizes are large.
• D)is always correct.

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Definitions:

Signal Transduction

A process in which a cell converts and amplifies an extracellular signal into an intracellular signal that affects some function in the cell. Also see cell signaling.

ATP

Abbreviation for adenosine triphosphate, a molecule that stores and transmits chemical energy within cells, vital for many cellular processes.

Plasmodesmata

Microscopic channels that traverse the cell walls of plant cells and some algal cells, facilitating intercellular communication and transport.

Desmotubule

A central rod-like structure of desmosomes, which are special cell-cell adhesion structures, facilitating cellular communication and cohesion in multicellular organisms.