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Post Reopened by whuber♦
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Elbenson Rescober
Elbenson Rescober
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Need help on my research!

  1. We are introducing a new process in 2021 which might affect customer returns behavior. My data is in proportions which is total number of returns of total number of units sold. I need to test if there's a significant difference of returns/units sold in 2020 versus 2021 using the new process. Sample table below

enter image description here

Question, given this data is it true that I can use the Z-test Hypothesis testing comparing two proportions?

  1. In relation to question no. 1, what if Total Business is breakdown into different categories. LIke the table below. Basically this is just a breakdown of the total business.

The objective is to test if there are significant difference in 2021 with new process in terms of category level.

enter image description here enter image description here

Given this, is it safe to use the CHI-SQUARE TEST?

Need help on my research!

  1. We are introducing a new process in 2021 which might affect customer returns behavior. My data is in proportions which is total number of returns of total number of units sold. I need to test if there's a significant difference of returns/units sold in 2020 versus 2021 using the new process. Sample table below

enter image description here

Question, given this data is it true that I can use the Z-test Hypothesis testing comparing two proportions?

  1. In relation to question no. 1, what if Total Business is breakdown into different categories. LIke the table below. Basically this is just a breakdown of the total business.

The objective is to test if there are significant difference in 2021 with new process in terms of category level.

enter image description here Given this, is it safe to use the CHI-SQUARE TEST?

Need help on my research!

  1. We are introducing a new process in 2021 which might affect customer returns behavior. My data is in proportions which is total number of returns of total number of units sold. I need to test if there's a significant difference of returns/units sold in 2020 versus 2021 using the new process. Sample table below

enter image description here

Question, given this data is it true that I can use the Z-test Hypothesis testing comparing two proportions?

  1. In relation to question no. 1, what if Total Business is breakdown into different categories. LIke the table below. Basically this is just a breakdown of the total business.

The objective is to test if there are significant difference in 2021 with new process in terms of category level.

enter image description here

Given this, is it safe to use the CHI-SQUARE TEST?

deleted 2 characters in body
Source Link
Elbenson Rescober
Elbenson Rescober
  • 1
  • 1

Need help on my research!

  1. We are introducing a new process in 2021 which might affect customer returns behavior. My data is in proportions which is total number of returns of total number of units sold. I need to test if there's a significant difference of returns/units sold in 2020 versus 2021 using the new process. Sample table below

enter image description hereenter image description here

Question, given this data is it true that I can use the Z-test Hypothesis testing comparing two proportions?

  1. In relation to question no. 1, what if Total Business is breakdown into different categories. LIke the table below. Basically this is just a breakdown of the total business.

The objective is to test if there are significant difference in 2021 with new process in terms of category level.

enter image description here

enter image description here Given this, is it safe to use the CHI-SQUARE TEST?

Need help on my research!

  1. We are introducing a new process in 2021 which might affect customer returns behavior. My data is in proportions which is total number of returns of total number of units sold. I need to test if there's a significant difference of returns/units sold in 2020 versus 2021 using the new process. Sample table below

enter image description here

Question, given this data is it true that I can use the Z-test Hypothesis testing comparing two proportions?

  1. In relation to question no. 1, what if Total Business is breakdown into different categories. LIke the table below. Basically this is just a breakdown of the total business.

The objective is to test if there are significant difference in 2021 with new process in terms of category level.

enter image description here

Given this, is it safe to use the CHI-SQUARE TEST?

Need help on my research!

  1. We are introducing a new process in 2021 which might affect customer returns behavior. My data is in proportions which is total number of returns of total number of units sold. I need to test if there's a significant difference of returns/units sold in 2020 versus 2021 using the new process. Sample table below

enter image description here

Question, given this data is it true that I can use the Z-test Hypothesis testing comparing two proportions?

  1. In relation to question no. 1, what if Total Business is breakdown into different categories. LIke the table below. Basically this is just a breakdown of the total business.

The objective is to test if there are significant difference in 2021 with new process in terms of category level.

enter image description here Given this, is it safe to use the CHI-SQUARE TEST?

Post Closed as "Needs details or clarity" by BruceET, Arya McCarthy, kjetil b halvorsen♦
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Elbenson Rescober
Elbenson Rescober
  • 1
  • 1

Hypothesis testing multiple proportions

Need help on my research!

  1. We are introducing a new process in 2021 which might affect customer returns behavior. My data is in proportions which is total number of returns of total number of units sold. I need to test if there's a significant difference of returns/units sold in 2020 versus 2021 using the new process. Sample table below

enter image description here

Question, given this data is it true that I can use the Z-test Hypothesis testing comparing two proportions?

  1. In relation to question no. 1, what if Total Business is breakdown into different categories. LIke the table below. Basically this is just a breakdown of the total business.

The objective is to test if there are significant difference in 2021 with new process in terms of category level.

enter image description here

Given this, is it safe to use the CHI-SQUARE TEST?