sample size

What:

"In some ways, determination of sample size is like buying a home; particularly when sample size is fixed. When you decide to buy a home and you can afford only $300,000, you may be able to buy a home with two bedrooms and a large living room, or a home with three bedrooms and a small living room. Likewise,if for financial or time constraints you can collect data from only 300 patients, that is what you can afford; with that you can get a small α and a large β, or a large α and a small β, or a small α and small β but a large d. You need to make sacrifices somewhere"

Writer: Farhad Islami MD PhD.

LCC:

Where:

Date: Sep 3 2014 7:13 PM

What:

"The large sample size allows us to see patterns with more clarity than ever before," Novembre said. "If rare variants are like distant stars, this kind of large sample size is like having the Hubble Telescope; it's allowing us to see more than before. We see a ton of rare variation, and these rare variants more often make changes to proteins than not. In that way, this study has important implications for the genetic basis of disease in humans. It's consistent with the idea that many diseases may be partly caused by rare variants."

Writer: John Novembre

LCC:

Where:

Date: Sep 3 2014 7:15 PM

What: "Any study conducted on treatment program outcomes should have a large sample size. A study without a large sample size is like going to a museum, looking at a few paintings and thinking you've seen every exhibit."

Writer: Not Stated

LCC:

Where: Reference Link Has Evaporated

Date: Sep 3 2014 7:20 PM

What: "Not unique to the Chi square, sample size is like a lever. Long enough lever and you can flip over a Mack truck. Does that mean the truck is unstable? With a large enough sample size you can prove differences in anything. That is why you should have been taught to look for practical significance if you see statistical significance."

Writer: Mikel

LCC:

Where:

Date: Sep 3 2014 7:22 PM

What:

"Intuitively, increasing sample size is like increasing the magnification of a telescope. From a distance, two dots might seem indistinguishably close: with the telescope, you realize there is space between them. Sample size puts "probability space" between the null and alternative."

Writer: Placidia

LCC:

Where:

Date: Sep 3 2014 7:28 PM

What: "Ideas are the raw materials of testing -the tiles within the marketing mosaic. Sample size is like the size of the canvas- how large a picture you need to see the marketplace clearly. Variation distances you from the market landscape and clouds your view. The greater the distance, the larger the canvas you need to paint. You can't simply evaporate the fog, so you need enough sample size to see through it.

Writer: Not Stated

LCC:

Where:

Date: Sep 3 2014 7:18 PM

What:

"Let's draw an analogy: Sample size is like the resolution of in an image or the size of mesh in a net. If you take a close up picture of a leaf with jagged edges or a rough surface with the camera in an inexpensive cell phone, the resolution of the image may be too low to capture all the detail. We refer to pictures that fail to do this as grainy or pixelated."

Writer: Rex Gilliland

LCC:

Where:

Date: Sep 3 2014 7:24 PM

What:

"In both cases, sample size is like magnification with a microscope: the smaller the object that's being observed, the more magnification we need."

Writer: David L. Streiner

LCC:

Where:

Date: Sep 3 2014 7:27 PM