A Final Exam in Math 160 Has a Mean of 73

question 137

Multiple Choice

A final exam in Math 160 has a mean of 73 with standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is greater than 71.

• A) 0.9012
• B) 0.5036
• C) 0.8962
• D) 0.0008

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Definitions:

Ascending Limb

The portion of the loop of Henle in the nephron that carries fluid from the renal medulla toward the cortex of the kidney, crucial for the concentration of urine.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Facilitated Diffusion

Carrier-mediated process that does not require ATP and moves substances into or out of cells from a high to a low concentration.

Proximal Convoluted Tubule

The proximal convoluted tubule is part of the nephron in the kidney, playing a crucial role in the reabsorption of water, ions, and nutrients back into the bloodstream.