stat 10 hw

# stat 10 hw - Stat 101-002 Heller Cengiz Rahmioglu Penn ID...

This preview shows pages 1–2. Sign up to view the full content.

Stat 101-002          Cengiz  Rahmioglu Heller          Penn ID:  37479511 STAT 101 HW 1.  (a) Population Parameter, p, represents the proportion of electronic components that work  correctly. Null Hypothesis: More than 99.9% of the cellular phones work correctly. Alternative Hypothesis: Less than 99.9% of the cellular phones work correctly. (b) Type I error: Rejecting the null hypothesis when it’s true. In other words, accepting that less  than 99.9% of the cellular phones work correctly by rejecting the null hypothesis. Type II error: Failing to reject the null hypothesis when it’s false. In other words, accepting that  more than 99.9% of the cellular phones work correctly when in reality the null hypothesis is  false.  (c) In order to use the z-test, np 0 >10 and n(1-p 0 )>10 should be satisfied. In this case, as n=100  and p 0 =.99 we can’t use the z-test.  (d) SE(xbar)= √0.999(1-0.999)/100= 0.003 z=(1-0.999)/0.003=0.333 p-value=P(Z<z)= .63 Assumptions: SRS, IID variable.    (e) The data doesn’t reject the null hypothesis because p-value>0.05. 2. (a) H 0 =Less than 30% of the customers are able to program their DVD player with the new  manual. H

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 06/22/2008 for the course STAT 101 taught by Professor Heller during the Fall '08 term at UPenn.

### Page1 / 3

stat 10 hw - Stat 101-002 Heller Cengiz Rahmioglu Penn ID...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online