SOLUTION: Given: N = 19 alpha = 0.05, 1 tail Null hypothesis: The coin is fair Alternative hypothesis: The coin is biased towards heads Obtained value: 17 heads b) What is the Crit

Question 1199559: Given:
N = 19
alpha = 0.05, 1 tail
Null hypothesis: The coin is fair
Alternative hypothesis: The coin is biased towards heads
Obtained value: 17 heads
b) What is the Critical Value?
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
sample size = 19
standard error = (.5 * .5 / 19) ^ .5 = .1147
critical z-score with one tailed .05 alpha on the high end is equal to 1.645.
sample z-score = (17/19 - .5) ./ .1147 = 3.44
this is well above the critical z-score, therefore the results are significant.

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