The Mean Amount Spent by a Family of Four on Food

question 57

Multiple Choice

The mean amount spent by a family of four on food is $500 per month with a standard deviation of $75. Assuming that the food costs are normally distributed,what is the probability that a family spends less than $410 per month?

• A)0.2158
• B)0.8750
• C)0.0362
• D)0.1151

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Definitions:

Competitive Molecules

Molecules that compete with each other for binding sites on enzymes or receptors in biological systems.

Sodium-Potassium Pump

A cell membrane protein that uses ATP to move sodium ions out of the cell and potassium ions into the cell, essential for cellular function.

Plasma Membrane

The phospholipid bilayer that surrounds cells, controlling the movement of substances in and out of the cell, thereby maintaining its internal environment.

Actively Transports

The process of transporting materials through cellular barriers against the direction of concentration differences, necessitating the use of energy.