Hi,
I would like to ask you for little help
I have 4 types/gropus of artificial lenses (named: BY, Softec, ZA, ZCB). In each type there was done calculation using a 3 different formulas (1,2,3). I have 30 subjects in each lens type.
I would like to compare means between ZCB and other lenses for each formula....
Example:
1. ZCB_Formula 1 vs BY__Formula 1
2. ZCB_Formula 1 vs Softec_Formula 1
3. ZCB_Formula 1 vs ZA_Formula 1
.
.
Than same for formula 2 and 3
I have done t test for each couple.
My question is  is it neccesary to use Bonferroni correction in this case. There are 3 measurements...so should I multiply p value from ttest by 3x?
Im attaching the file for better understanding.
Thank you for your answers.
Best regards
IP
I would like to ask you for little help
I have 4 types/gropus of artificial lenses (named: BY, Softec, ZA, ZCB). In each type there was done calculation using a 3 different formulas (1,2,3). I have 30 subjects in each lens type.
I would like to compare means between ZCB and other lenses for each formula....
Example:
1. ZCB_Formula 1 vs BY__Formula 1
2. ZCB_Formula 1 vs Softec_Formula 1
3. ZCB_Formula 1 vs ZA_Formula 1
.
.
Than same for formula 2 and 3
I have done t test for each couple.
My question is  is it neccesary to use Bonferroni correction in this case. There are 3 measurements...so should I multiply p value from ttest by 3x?
Im attaching the file for better understanding.
Thank you for your answers.
Best regards
IP
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