The Accountant at a Department Store Is Analyzing the Credit

question 58

Short Answer

The accountant at a department store is analyzing the credit card purchases of 100 of the store's cardholders over the past year.The following table lists the frequency distribution of the continuous random variable x,annual credit card purchases.
What is the relative frequency density of the 400 to less than 600 class? Round your answer to 5 decimal places.

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Definitions:

Electrolytes

Substances that produce ions and conduct electricity when dissolved in water.

Not Electrolytes

Substances that do not dissociate into ions in solution and therefore cannot conduct electricity in their molten or aqueous states.

Non-electrolytes

Substances that do not produce ions when dissolved in water, and hence do not conduct electricity in solution.

Non-electrolyte

A substance that does not readily ionize when dissolved or melted and is therefore a poor conductor of electricity.