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ibrahim_ap

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

msxhj

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