How do I calcuate an IC50 from analyze it?

[Fred Smith]

First you need to tell us what IC50 is.

 

[Gary''s Student]

Create a simple table of two columns. The first column could be the
concentration in the desired units i.e. micrograms per litre. The second
column could be the inhibitory effect from 0% to 100%. Then you can use
VLOOKUP() to find the approximate 50% level.

 

[jc33]

Can you please define each paramater that needs to be entered?
lookup_value
table_array
col_index_num
range_lookup

 

[Dave Peterson]

You could look at Debra Dalgleish's site:
http://www.contextures.com/xlFunctions02.html

It might help with the questions caused by excel's help for =vlookup().