P-value..hypotheses

• Apr 5th 2008, 05:54 AM
Morgan82
P-value..hypotheses
I had a quiz. I want to know if I got this right..

The amount of students who enrolled in AP statistics and dropped out is 13%.
A company wants to test a computer program to see if it is effective to help the students.
They then took a sample of students who used the product. Out of 203 students, 11% of the students dropped out.

Whats the meaning of P-value?
Of course what is pvalue?
What would you say about this? Is the product effective?

What I did was find p-value and then did a confidence interval.
Can someone do it so I can see if I was right? thanks!
• Apr 5th 2008, 01:32 PM
mr fantastic
Quote:

Originally Posted by Morgan82
I had a quiz. I want to know if I got this right..

The amount of students who enrolled in AP statistics and dropped out is 13%.
A company wants to test a computer program to see if it is effective to help the students.
They then took a sample of students who used the product. Out of 203 students, 11% of the students dropped out.

Whats the meaning of P-value?
Of course what is pvalue?
What would you say about this? Is the product effective?

What I did was find p-value and then did a confidence interval.
Can someone do it so I can see if I was right? thanks!

If you show your working I'll let you know if you're right or not.
• Apr 5th 2008, 04:31 PM
Morgan82
Quote:

Originally Posted by Morgan82
I had a quiz. I want to know if I got this right..

The amount of students who enrolled in AP statistics and dropped out is 13%.
A company wants to test a computer program to see if it is effective to help the students.
They then took a sample of students who used the product. Out of 203 students, 11% of the students dropped out.

Whats the meaning of P-value?
Of course what is pvalue?
What would you say about this? Is the product effective?

What I did was find p-value and then did a confidence interval.
Can someone do it so I can see if I was right? thanks!

Ho : p=.13
Ha : P<.13
SD=.0219
z-score=-.907
P=.1814

So, would you say the product was effective?
• Apr 5th 2008, 04:47 PM
mr fantastic
Quote:

Originally Posted by Morgan82
Ho : p=.13
Ha : P<.13
SD=.0219
z-score=-.907
P=.1814

So, would you say the product was effective?

Is the p-value larger or smaller than the level of significance you used .....?

(By the way, one small thing .... I get sd = 0.0220 ......)
• Apr 5th 2008, 04:49 PM
Morgan82
Quote:

Originally Posted by mr fantastic
Is the p-value larger or smaller than level of significance you used .....?

larger. 5%
• Apr 5th 2008, 04:55 PM
mr fantastic
Quote:

Originally Posted by Morgan82
larger. 5%

Well, if your p-value is larger than the level of significance used, you must realise that the p-value is NOT significant .......!! And if the p-value is not significant, ........