A Major Department Store Has Determined That Its Customers Charge

question 28

Short Answer

A major department store has determined that its customers charge an average of $500 per month, with a standard deviation of $80. Assume the amounts of charges are normally distributed.
a.What percentage of customers charges more than $380 per month?
b.What percentage of customers charges less than $340 per month?
c.What percentage of customers charges between $644 and $700 per month?

---

Definitions:

Pruritus

The medical term for itching, a common symptom causing the desire or reflex to scratch.

Hearing

The ability or process of perceiving sound.

5-Year-Old

A child who is five years of age, a period characterized by rapid development in motor skills, language, and social interaction.

Conventional Audiometry

A hearing test that determines a person's hearing thresholds using tones of various frequencies and intensities.