Question

8. a) A coin is tossed 100 times under identical conditions yielding 30 heads and 70 tails. Test at 1% level of significance whether the coin is biased
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Answer 1

Answer:

Step-by-step explanation:

H. : the coin is baised

P=1/2

H. : P not equal to 1/2 (two tailed)

p=30/100 = 0.3         n=100

p=1/2      q=1-p

                =1-1/2 = 1/2

|Z| = p-P/$\sqrt{Pq\n}$/n

    =0.5-0.3/$\sqrt{0.5*0.5/100$

    =4

|Z|tab=2.58

|Z|cal>|Z|tab

H. rejected

.

.   .     coin is biased