Inferential Statistics Revision handout - Hypothesis testing, z scores, p-value, etc. (Leaving Cert)

Inferential Statistics revision handout. Hypothesis Testing, 95% confidence interval for the mean, 95% confidence interval for proportion, z-scores, p-values, finding sample size (find n). Leaving Cert Maths Inferential statistics explained. All credit to DEB Maths for question.

[@mrswag7544]

Here i am again paper 2 tomoz😢 first time understanding this all year

[@violetsden]

REAL 😭

[@mrswag7544]

@@violetsden I'm actually cooked

[@Action_packedmovie7]

@@mrswag7544 ah sure till be grand

[@lilymae5266]

Swear I don’t remember this chapter being so convoluted

[@user-os4of2oi3w]

at 6:00 should the null hyp not be 'not representative' if the guy claimed that in the question as opposed to what you've done?

[@mopryIScool]

Shouldnt you never accept a null hypothesis?

[@oisinnoonan3349]

Facts my g

[@user-mk7uf5qg6o]

Wrong. You can reject the null hypothesis and accept the alternative.

[@user-mk7uf5qg6o]

​@oisinnoonan3349
It's not facts.

[@rickybyrne4485]

paper in 15 minutes bro thanks

[@tullamaths]

I hope it will help for your exam.

[@nonaaame550]

The goat

[@pilotham]

Paper 2 last min revision 😂

[@hubertkam7647]

why is it 1.96 and where did you get that formula?????????

[@tullamaths]

The 1.96 is the z score, which comes from the "probability for standard normal distribution" (pg 36 Log Tables). 1.96 relates to 0.975 or 97.5% (i.e 2.5% at either end), which makes 5% in total. Hence 95% confidence interval.

[@hubertkam7647]

@@tullamaths thank you

[@ciancaffrey7375]

What is a p value

[@Cara-sb2fs]

Guessing we’re both gonna fail tmr

[@Juniormains]

⁠​⁠@@Cara-sb2fs 😂😂😂

[@skxll5535]

​@@Cara-sb2fs rip

[@mysticwolf3577]

Its 2x(1 -ur z score)

[@willkelly05]

You fail to reject the null hypothesis you don’t accept it.