Solve the Problem. -Suppose That Replacement Times for Washing Machines Are Normally Distributed

question 33

Multiple Choice

Solve the problem.
-Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation of 1.1 years. Find the probability that 70 randomly selected washing machines will have a mean replacement time less than 9.1 years.

• A)0.0714
• B)0.0643
• C)0.4357
• D)0.4286

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Definitions:

Cigarette Prices

The retail cost of cigarettes, which can be influenced by factors such as taxes, production costs, and demand.

Elastic Demand

A demand situation where the quantity demanded of a good or service changes significantly when its price changes.

Total Revenue

The total amount of money a firm receives from sales of its goods or services, calculated as the price per unit times the number of units sold.

Quantity Demanded

The total amount of a good or service that consumers are willing and able to purchase at a given price over a specified period of time.