Customer Satisfaction

Thousands of researchers have chosen PASS to be their sample size estimation application. Our customers are very happy with the documentation, technical support, broad number of procedures, and ease-of-use of PASS software.

PASS Product Testimonials

"PASS is a great program. It does so much and is easy to use. It’s much better than the other sample size programs I’ve used—it has helped me greatly in my research."

Ken Lawson, Ph.D., The University of Texas


“I’ve used NCSS since 1986 and PASS since 1997. The utility, precision, documentation, output and ease-of-use of your products are the best in the business. Thank you!”

Tim Gohmann, Ph.D.,


I adore NCSS and PASS. I have been using them for 20 years now.

Mario Martinez Gonzalez, MPH, FEE, MD, Universidad Nacional Autonoma de Mexico


"PASS 13 is fantastic! Better than my new dishwasher and microwave combined."

Dr. Barbara Tabachnick, CSUN, Author


"Two reasons for choosing your product [PASS]: all-around methods and options + very good documentation."

Mika Kurkilahti, PhD


"Your [PASS] routines are flexible and easy to use and your customer service and support is A-double-plus."

Nayak Polissar, PhD


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As Statistician teaching statistics in the University, I have to say that NCSS is the tool that I have used since 1997. With all the procedures that you need for research or to make a good, informative presentation, it can be used for teaching in a university. Here in Idesem-Chile we have found it to be the best tool to support our measurement activities. I recommend this tool to make your job more enjoyable!

Frank Gallardo Pastore, Ph.D, AIU, CEO

"PASS is a great program. It does so much and is easy to use. It’s much better than the other sample size programs I’ve used—it has helped me greatly in my research."

Ken Lawson, Ph.D., The University of Texas