2. The projected size of the thing.
A projected sample size of 23,000 will allow the prevalence of each marker to be estimated with the following precision: a marker with 0.50% prevalence to within 0.10%; a marker with 1.00% prevalence to within 0.13%; and a marker with 4.50% prevalence to within 0.27%.
Assuming that 75% of these women would agree to participate (29,000) and that complete ultrasound and outcome data would be available for 80% of pregnancies, the study would have a projected sample size of 23,000.
In anticipation of a dropout rate of 27%, as seen in our previous study, a projected sample size of 120 participants was required to yield 88 completing participants over 20 weeks.
With a projected market size of over $215 billion in 2021, according to IDC Research, there are billions of reasons to pay attention to AR.
The large number of potential new therapies should not be surprising given a projected market size of US$3.7 billion for a safe and effective anti-obesity drug (Vickers and Cheetham, 2007).
The X-ray jet extends arcsec from the quasar core, corresponding to a projected linear size of kpc.
The data were collected from 1st Mar 31st May 2012 from 35 sentinel sites with a projected sample size of 400 from each site.
The sample size calculations are based on (1) published descriptive statistics for hair nicotine and hair cotinine, (2) specified effect sizes, (3) a projected average clinic size of 30 infants, and (4) a projected response rate of 80%.
Mosaic tiling is, however, messy and time-consuming, so it's a good idea to block off a weekend for a project the size of this table.
Previous research with the target population has resulted in an 80% retention rate over a 15-week period [ 16], translating to a final projected sample size of 100 retained participants at the 15-week follow-up for the current study.
