Question 150086
A coin was flipped 60 times and came up heads 38 times. 

A)At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
Ho: p = 1/2
Ha: p > 1/2
----------------
I ran a 1-prop z test 
test statistic: z = 2.06559...
p-value = 0.01943...
----------
Decision Rule: If test statistic is greater than 1.28155, reject Ho.
-------------
 

(b) Calculate a p-value and interpret it.
p-value = 0.01943...
Only 1.943% of test results could give stronger evidence for rejecting Ho.
----------------
Conclusion: Since p-value is less than 10%, reject Ho.
The coin is biased toward heads.
==================
Cheers,
Stan H.