Actually im working on Initial public offering In India.Where SEBI market regulator has introduced a new concept Anchor investor in 2009.So now i have collected data of IPO listed on NSE platform .i.e
IPO backed by anchor investors from 2009 to 2018.
and IPO without anchor investor backed from 2002 to 2009,
now i want to calculate their returns on first day of listing and bring out their mean and then try to see their mean difference.which statistical tool is best to compare the result?
note: samples are different
There is no such thing as pre test, except if you're trying to determine power and sample size. But you can use ANOVA and post hoc tests
Since you have multiple time points with a change that occurs in the middle of the series, I suggest that you look into a "regression discontinuity" design.
Thank you for your kind help Andrew sir and David sir..i'm bit confused about post hoc tests ,since i m having only one independent and one dependent variables , could you please clear my doubt?
Andrew Paul McKenzie Pegman
In that case, you don’t need post hoc tests, just one test like a 2 sample t test, which will show a significant difference in means if p is < 0.05
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