# Average Run Length (Student Question)

M

#### myke74

Hello,

i'm doing exercises about the average run length, and i'm watching at these two that i attached in the docx file.

Could someone told me where i can find the table for the function "φ" used in the exercises?

thanks

jack

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M

#### myke74

Hi,

i studied on the book OC cruves and ARL, but there aren't exercises related to these topics and i have some difficulty to find them on the web.

Could someone help me posting an exercise useful for realize if i understood these topics?

Thank you very much,

Jack.

D

#### Darius

Could someone told me where i can find the table for the function "φ" used in the exercises?
where?...,anywhere ...
If you have Excel, you can obtain it

function "φ"= Accumulative Normal distribution to use Z values or NormS distribution (for short).

If you have Excel in English is sort of:

=+NORM.S.DIST(-0.21,TRUE)
0.416833837

note: so almost any statistical book could have Normal distribution chart, but it could be easer to use Excel

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