PakMediNet Discussion Forum : Biostatistics : sample size
sample size
Dears
I am intending to conduct a study to find out which one is faster , freehand vs. laser guide device using ultrasound on a model. only information got from previous study, freehand (median=10.5; IQR=6.5–14.5), laser device 43 (33; 21–55).
please advice on sample size, and which test i should use for comparison?
Thanks
Mahaj
Posted by: msxhjPosts: 5 :: 15-01-2010 :: | Reply to this Message
Re: sample size
Dear Madam
on the basis of such information we cannot calculate sample size, you may get free services on such difficulty, pl contact 0300-4668681
Posted by: ibrahim_apPosts: 138 :: 29-01-2010 :: | Reply to this Message