Confidence Intervals Practice Problem 1

[@gloriousliyah9710]

When doing sample mean you should use a T interval

[@shanyabowen8408]

I need that calculate in my life.

[@GizmoHey]

Wait why do we have to use inverse Normal?

[@nancypalencia4504]

Thank you very much! This was super helpful

[@thatomononyane521]

I like how you assumed that we all have a calculator like that😪

[@bkgirlmay]

um for of all you talking about that calculator. That's a standard calculator. You will probably need it in college for higher-level maths. It's called a TI-84.

[@cansabanci]

Casio also has good ones. But nowadays there tons of calculators online, desmos has a good one

[@hassanbeila62]

maaaaan thak you! please keep positng

[@mpoljak09]

It is a one sample T interval

[@ogassherby5872]

Z*

[@mpcmpc9132]

what if the sample was smaller than 30? what would happen

[@gouriseetagouri686]

then you would need to look at sampling distribution to see if it was aproximatly normal

[@aliyunura451]

most of us don't have fancy calculators and even if we do they don't let them inside the exam class

[@chandlerkeaton1337]

yes you can use a ti-84 for exams

[@Jdicecream]

@@chandlerkeaton1337 naw in my stats class we need a basic calculator, can’t do anything fancy

[@thaliafawaz323]

i love u

[@divinest]

isn't it 50 adults not 500 adults

[@MATHRoberg]

Yes, but when checking the independence condition we must be sure our sample of 50 adults is no greater than 10% of the entire population. So as long as the population has at least 500 adults, we can sample without replacement.

[@rubianimaz789]

You lost me at why I need to state my statement

[@rubianimaz789]

No wonder my profesor doesn’t let me use a T-81 🥲