Hypothesis testing - Alevel Math AQA
Hi!! Hope you doing okay 
Thank you for taking the time to help me with the following question... I'd appreciate any workings & if you have a possible answer that would be even better.
Question 3.
The school tombola at the Christmas Fayre displays a sign '1 in 5 tickets is a winner'. Meghana decides to test this claim. She buys 12 tickets & none of them a winning tickets. c. How many Tickets would she have to buy for the critical region to have a non-empty lower tail.
So far I have:
P = winning ticket
Null hypothesis: p = 0.2
Alternative hypothesis: p ≠0.2
Significance level: 5% (2 tail test)
X~B (12,0.2)
P(X=0) = 0.06872 (>0.025 so accept null hypothesis/null hypothesis remains unchanged)
I know a lower tail test is <= and a non empty set is a set with elements.
And I don't know where to go from there. Thank you
Thank you for taking the time to help me with the following question... I'd appreciate any workings & if you have a possible answer that would be even better.
Question 3.
The school tombola at the Christmas Fayre displays a sign '1 in 5 tickets is a winner'. Meghana decides to test this claim. She buys 12 tickets & none of them a winning tickets. c. How many Tickets would she have to buy for the critical region to have a non-empty lower tail.
So far I have:
P = winning ticket
Null hypothesis: p = 0.2
Alternative hypothesis: p ≠0.2
Significance level: 5% (2 tail test)
X~B (12,0.2)
P(X=0) = 0.06872 (>0.025 so accept null hypothesis/null hypothesis remains unchanged)
I know a lower tail test is <= and a non empty set is a set with elements.
And I don't know where to go from there. Thank you
Reply 1
aha ic ant do this either lol
legit gonna fail maths alevel
legit gonna fail maths alevel
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