gofsummdata - Data sheet Chi square tests Table 47 Goodness...

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

View Full Document Right Arrow Icon

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

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

Unformatted text preview: Data sheet - Chi square tests Table 47: Goodness of fit test calculations Score Frequency, O i Expected, E i O i- E i ( O i- E i ) 2 E i 1 5 10-5 (- ) 2.5 2 11 10 1 (+) 0.1 3 8 10-2 (- ) 0.4 4 10 10 (+) 0.0 5 14 10 4 (+) 1.6 6 12 10 2 (+) 0.4 Total 60 60 5.0 Table 48: Goodness of fit test calculations - using a continuity correction Suppose that an ESP experiment has a test where the probability of a correct response by guessing is 1 5 . In 25 trials, a subject gives 11 correct responses. Test the hypothesis that this is down to chance. Score Frequency, O i Expected, E i O i- E i ( | O i- E i |- 1 2 ) 2 E i Right 11 5 6 (5 . 5) 2 5 = 6 . 05 Wrong 14 20-6 (5 . 5) 2 20 = 1 . 51 Total 25 25 7.56 Evaluating our modified test statistic we obtain 7.56. For a χ 2 1 random variable, one degree of freedom, the 1% critical value is 6.63, so our test statistic is significant at the 1% level, and we reject the null hypothesis that the subject is guessing....
View Full Document

{[ snackBarMessage ]}

Page1 / 2

gofsummdata - Data sheet Chi square tests Table 47 Goodness...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online