The length of time that a certain type of watch will run is an exponential random variable. This type of watch will run for an average of 31 months.   Find the variance for the number of months that this type of watch will run. Variance: ____________________     __________________ percent of the watches will run for more than 3 years before stopping.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
Author:Carter
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Chapter4: Equations Of Linear Functions
Section4.6: Regression And Median-fit Lines
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  1. The length of time that a certain type of watch will run is an exponential random variable. This type of watch will run for an average of 31 months.

 

  1. Find the variance for the number of months that this type of watch will run.

Variance: ____________________

 

 

  1. __________________ percent of the watches will run for more than 3 years before stopping.

 

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