Solve the Problem $10 \%$ And Above the Bottom $60 \%$ C: Scores Below the Top 40\% and Above the Bottom

question 123

Multiple Choice

Solve the problem.
-A history teacher assigns letter grades on a test according to the following scheme:
A: Top 10\%
B: Scores below the top $10 \%$ and above the bottom $60 \%$
C: Scores below the top 40\% and above the bottom 20\%
D: Scores below the top $80 \%$ and above the bottom $10 \%$
F: Bottom $10 \%$ Scores on the test are normally distributed with a mean of 70 and a standard deviation of 12.9. Find the numerical limits for each letter grade.

• A)A: Above 82
• B: Between 73 and 82
• C: Between 60 and 72
• D: Between 53 and 59
• F: Below 53
• B)A: Above 82
• B: Between 73 and 82
• C: Between 60 and 72
• D: Between 56 and 59
• F: Below 56
• C)A: Above 87
• B: Between 77 and 87
• C: Between 59 and 76
• D: Between 53 and 58
• F: Below 53
• D) A: Above 87
• B: Between 73 and 87
• C: Between 59 and 72
• D: Between 53 and 58
• F: Below 53

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Definitions:

Absorption

(1) The movement of nutrients and other substances through the wall of the digestive tract and into the blood or lymph. (2) The process by which chlorophyll takes up light for photosynthesis.

Haversian Canals

Microscopic channels in compact bone that house blood vessels and nerve fibers, part of the bone's nutrient and waste management system.

Extracellular Matrix

A complex network of proteins and carbohydrates surrounding cells, providing structural and biochemical support to the surrounding cells.

Osteoblasts

Cells responsible for new bone formation, essential for growth and bone repair.