• We are pleased to announce that the winner of our Feedback Prize Draw for the Winter 2024-25 session and winning £150 of gift vouchers is Zhao Liang Tay. Congratulations to Zhao Liang. If you fancy winning £150 worth of gift vouchers (from a major UK store) for the Summer 2025 exam sitting for just a few minutes of your time throughout the session, please see our website at https://www.acted.co.uk/further-info.html?pat=feedback#feedback-prize for more information on how you can make sure your name is included in the draw at the end of the session.
  • Please be advised that the SP1, SP5 and SP7 X1 deadline is the 14th July and not the 17th June as first stated. Please accept out apologies for any confusion caused.

CT3 CH12 Hypothesis Testing Q12.15

S

Sunil Sanga

Member
Query : Why did value t4 at 5% is negative ?
This is left tailed test and this should be positive.
Or evertime when we see values of normal and t distribution would be in +- form(+-2.132) due to both these are symmetrical. Please clarify
 
Are u talking about the value of t4 or test statistics. Since it is left tailed test, obviously we will compare the test statistics value with lower 5% ( which is negative). For left tailed-we need to see whether the test statistics is greater than the lower 5% value and for right tail- we need to see whether it is less than upper 5%. Since it should lie in the (-2.132,+2.132) interval for the null hypothesis to be accepted.
 
You must log in or register to reply here.
Back
Top