The Life of a Light Bulb Is Exponentially Distributed with a Mean

question 73

Multiple Choice

The life of a light bulb is exponentially distributed with a mean of 1,000 hours.What is the probability that the bulb will last: More than 1,200 hours?

• A).3012
• B).3679
• C).4345
• D).6988

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Definitions:

r Values

A measure of the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Hypotheses Testing

A statistical method used to determine whether there is enough evidence in a sample of data to infer that a certain condition is true for the entire population.

r Values

r Values, often denoted as the correlation coefficient, measure the strength and direction of a linear relationship between two variables.

Spearman Rank Correlation

A non-parametric measure of correlation that assesses the strength and direction of the association between two ranked variables, useful for ordinal data.