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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, 1-β.
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...
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