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Sally takes the same bus to work every morning. Let X=the amount of time (in minutes) that she has to wait for the bus on a randomly selected day. The probability distribution of Xcan be modeled by a uniform density curve on the interval from data-custom-editor="chemistry" 0minutesto8minutes. Define the random variable V=60X

a. Explain what Vrepresents.

b. What probability distribution does Vhave?

Short Answer

Expert verified

a. Vdenotes the amount of time (in seconds) that Sally will have to wait for the bus on a random day.

b. Vexhibits a consistent density curve spanning the time interval data-custom-editor="chemistry" 0to480seconds

Step by step solution

01

Part(a) Step 1 : Given Information   

Given :

X=the amount of time (in minutes)

The probability distribution of Xcan be modeled by a uniform density curve on the interval from: data-custom-editor="chemistry" 0minutesto8minutes.

Random variable :V=60X

02

Part(a) Step 2 : Simplification  

We know that Xdenotes the time (in minutes) that Sally will have to wait for the bus on a random day.

As a result, V=60X.

We also know that a minute is divided into role="math" localid="1654005209290" 60seconds.

If we increase the time in minutes by 60, we get the time in seconds.

As a result, Vdenotes the amount of time (in seconds) that Sally will have to wait for the bus on a random day.

03

Part(b) Step 1 : Given Information   

Given :

X=the amount of time (in minutes)

The probability distribution of Xcan be modeled by a uniform density curve on the interval from: data-custom-editor="chemistry" 0minutesto8minutes.

Random variable :V=60X

04

Part(b) Step 2 : Simplification  

Xexhibits a uniform density curve on the interval data-custom-editor="chemistry" 0to8minutes for probability distribution.

We know that Xdenotes the time (in minutes) that Sally will have to wait for the bus on a random day.

In addition, Xhas a consistent density curve from 0to8minutes.

Because V=60x, The constant60is multiplied by every data value in the Xdistribution.

If every data value is multiplied by the same constant, the form of the distribution remains intact.

The density curve of Xis uniform.

V,on the other hand, has a homogeneous density curve.

Zero minutes and zero seconds are the same for a uniform density curve.

Similarly, 8minutes is the same as 480seconds.

As a result, Vexhibits a consistent density curve spanning the time interval 0to480seconds.

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