This preview shows page 1. Sign up to view the full content.
Unformatted text preview: against Ho. Significant= smaller
than α. Means simply not likely to happen by chance. Reject Null
if P value smaller than α. Accept Null/ fail to reject null if p
value greater than α A significance test and confidence interval
will add to 100%. Increase power of significance test: increase
significance level α increase sample size, consider a particular
alternative farther away from mean of Ho, decrease st dev. Type I
Error: reject Ho when Ho is true. Type II: fail to reject Ho when
Ho is false. High type II error for Ha means test is not sensitive
enough to detect the alternative. Power probability that a fixed
level alpha significance test will reject Ho when a particular
alternative value of the parameter is true. 1 Type II error, 1β.
Strongest evidence against null is a small p value. Does the fancy
type fonts slow down reading of text on a computer screen?
Adults can read 4 P of text in an avg of 22 sec in Times New
Roman font. Ask 25 adults to read fancy fo...
View
Full
Document
This note was uploaded on 08/27/2013 for the course STATISTICS AP Statist taught by Professor Salas during the Fall '12 term at Alhambra Senior High.
 Fall '12
 Salas
 Statistics, AP Statistics

Click to edit the document details