A-Level Maths: O2-05 [Binomial Hypothesis Testing: Two-Tail Example 1]

[saragarber]

Thank you so much for these well explained videos! Honestly a maths legend!!
Quick question: if you have defined p at the beginning, do you still need to reiterate it when writing up the conclusion?

[Lewis-nbpn]

Is there any situation where by you’d have to look at both tails, and therefore how would you do this?

[rayyanshaikh]

Hi Sir, as this was a 2-tailed test, would you not have to consider both tails? In that case, why did you only consider P(X<=2) and not P(X>=2)?

[rajeshwaripittala]

thank you, I APPRECIATE YOU VERY MUCH

[NikV]

for edexcel, if i used the calculator to find out probability instead of binomial cumulative table but got to the right answer would I get all the marks?

[jacoblynaldi.delacruz]

Hi sir, may I ask why is the p-value computed in Rstudio different from what you have.

binom.test(5, 40, p=0.15, alternative = "two.sided")

produces a p-value of 0.8258

[owais]

I really need help with a question I'm given a mean of 3.20kg but the person expects it to be 3.30kg

I'm just wondering if I use 3.20kg or 3.30kg cuz the question says provide significantly evidence to prove that person is NOT right
I wanna know what my null hypothesis and alternative hypothesis

[is_emeline]

Hi Sir, I was wondering for the first sentence we write “let p be...” is for defining the random variable right? So for this question is to define x instead of p which is already given ? Thank you

[sharanjitshokar]

Sir I have a question but why don’t we look at the upper tail?

[Mk-rqix]

What would you do if the number of successes observed = the expected number?

[shaqifboksh]

How do you know whether to do a two tail test

[jiirjxj]

help please, i dont understand why you do p(x equal to or less than 2), its really confusing. is it because 2 is smaller than 5(%) or smaller than 40(n)

[monjola.adeagbo]

Sir is there any situation where the significance level isn't halved in a two tail test.

[saffiyabutt]

Hi TLMaths, how do you know to use BCD not BPD?

[gunanesansingarajah]

why is it there P(X<=2)=0.046>0.025?