I dont get what is going on here:
John wished to see if a coin was unbiased towards coming down heads. He decides that the level of significance of his test will be 5%.
If the random variable X represents the number of heads, what values of X would cause the null hypothesis to be rejected?
H0: p = 0.5 (the coin is not biased)
H1: p>0.5 (the coin is biased towards heads)
The probability of getting 7 or 8 heads is
3.1% + 0.4% = 3.5% (these values have been calculated using binomial
This is less than 5% and either X=7 or X=8 would cause the null hypothesis to be rejected.
Right, so this is my question:
Surely, if the probabiity of getting 7 or 8 heads is less than 5%, then it would lead to the null hypothesis NOT being rejected?
Thanks for your help.
Has yours come through yet?