You are Here: Home >< Maths

# Confidence levels: How to find alpha if I know Z? Watch

1. If I already know the value of , how do I go about finding ?

I'm after a formula, I know I can look up a Z table, but I'm making a computer program which needs to calculate alpha. Unless anyone knows any C# commands that will calculate it automatically!

Help will be much appreciated.
2. (Original post by The Racist Dragon)
If I already know the value of , how do I go about finding ?

I'm after a formula, I know I can look up a Z table, but I'm making a computer program which needs to calculate alpha. Unless anyone knows any C# commands that will calculate it automatically!

Help will be much appreciated.
Another way of writing is , so you get , where is your value for .
3. (Original post by CTArsenal)
Another way of writing is , so you get , where is your value for .
Thanks for the help!

How is and calculated? I think my knowledge on the fundamentals of statistics is very rusty or non existent as I'm a little lost now.
4. (Original post by The Racist Dragon)
Thanks for the help!

How is and calculated?
What do you mean, as in how to work them out? They're equal to each other so essentially

.

For instance, say your value of was , .

This gives us .
5. (Original post by CTArsenal)
What do you mean, as in how to work them out? They're equal to each other so essentially

.

For instance, say your value of was , .

This gives us .
Oh that example cleared things right up, thank you!
6. You can boost your confidence levels and truly become alpha by going to the gym, shooting up the test and shooting ropes in all kinds of men and women. That, is the true meaning of an alpha. good lukc brah stay shredded n make u some gains!!

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: July 18, 2014
Today on TSR

### Oxford grad sues for £1m

Claims damages because he didn't get a first

### 'No evidence of shots fired' at Oxford Circus

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.