The distribution of the time until a Web site changes

The distribution of the time until a Web site changes is important to Web crawlers that search engines use to maintain current information about Web sites. The distribution of the time until change (in days) of a Web site is approximated in the following table.

Days until Changes               Probability

1.5…………………………………...0.05

3.0…………………………………...0.25

4.5…………………………………...0.35

5.0…………………………………...0.20

7.0…………………………………...0.15

Calculate the probability mass function of the days until change.

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...

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