The Waiting Time at an Elevator Is Uniformly Distributed Between

question 87

Multiple Choice

The waiting time at an elevator is uniformly distributed between 30 and 200 seconds. What is the probability a rider must wait more than 1.5 minutes?

• A) 0.3529
• B) 0.4500
• C) 0.5294
• D) 0.6471

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Definitions:

Experimental Research

A research method that investigates causal relationships by manipulating one variable to see its effect on another, under controlled conditions.

Independent Variable

The variable that is manipulated in an experiment to test its effects on the dependent variable.

Dependent Variable

A variable in an experiment that is expected to change in response to manipulations of the independent variable.

Correlational Study

A research methodology that examines the relationship or association between two or more variables without determining causal direction.