Abayomi-Rufai Obarinde
Last answered:

05 Jan 2023

 Posted on:

01 Jan 2023
0

Resolved: Different between t-test and z-test

in Statistics / Test for the mean. Dependent samples

Why are we saying there is no variance when we are able to calculate the standard deviation

1 answers ( 1 marked as helpful)
Ned Krastev
Instructor
Posted on:

05 Jan 2023
2

Hi,
We don't say there is no variance but that we don't know it yet.
Best,
Ned

Helpful answer

Submit an answer

related questions

Apurva Audi
0
12
Resolved: Z-statistic and t-statistic
Muyiwa Adenusi
0
12
Resolved: Null and Alternative Hypothesis
Basma Shaaban Saadi Ali
1
10
Question 1 , confused about the answer and need to understand it clearly
Nisrin Dhoondia
0
8
Isn't it should be equal and more than the lower bound but less than the upper bound?
Timur Abdukarimov
1
8
Why the way of calculating STD error and STD error of difference is different?
Asmaa Abdulhamid
2
8
how to include both the interval start and end in the axis's name??? any help!!
Maureen Njeri
0
6
The lower and higher interval bounds are repetitive and it's confusing to me
Nunno Nugroho
0
6
Resolved: Different result with Excel formula