5 Drift Sneaker Puma Cat Ferrari PUMA Men's Corsa White Black Ultra rosso puma SAIWqFw 5 Drift Sneaker Puma Cat Ferrari PUMA Men's Corsa White Black Ultra rosso puma SAIWqFw 5 Drift Sneaker Puma Cat Ferrari PUMA Men's Corsa White Black Ultra rosso puma SAIWqFw 5 Drift Sneaker Puma Cat Ferrari PUMA Men's Corsa White Black Ultra rosso puma SAIWqFw 5 Drift Sneaker Puma Cat Ferrari PUMA Men's Corsa White Black Ultra rosso puma SAIWqFw 5 Drift Sneaker Puma Cat Ferrari PUMA Men's Corsa White Black Ultra rosso puma SAIWqFw
White Gel Sneaker Women's Fashion White Saga ASICS 7HxRgq7

Statistics Definitions > Stratum

U Indoor Slipper Men's black R O Deer Grey Clog Cushioned P S Stags Nordic Slipperooz Outdoor Sock P46BxRwqX

A Delineation of the Strata of England and Wales, with part of Scotland.

What is a Stratum?

Stratum in geology or biology refers to layers, as in a layer of rock or layer of skin. A stratum in statistics isn’t much different — you can think of it as where your target population is divided into non-overlapping layers, subgroups, or categories. For example, strata could define the socioeconomic statuses of a population:

  • 1: Lowest 25 percent of wage earners.
  • 2: Middle 50 percent of wage earners.
  • 3: Highest 25 percent of wage earners.

“Stratum” refers to a single subgroup or category, while “Strata” can mean several, or all, groups.

Strata do not need to be in layers…they can be categories that contain different geographical areas, different backgrounds, different races or other categorical definitions. The main point is that each stratum is completely distinct and that the strata do not overlap. A couple of examples of strata from Heel Block J Kitten Ankle Strap Red Low Adams Daisy Adorable Heel w80OZTqw:

Men's Cat Drift Ferrari Puma PUMA rosso Ultra Sneaker puma Black Corsa White 5 The lower strata of society have been hit especially hard by this economic downturn

the level of writing in that pop novel is several strata beneath that of serious fiction

So your strata in statistics could be economic status (if you were studying how income affects health) or even literary categories (if you were studying which type of author has the highest income).

The strata in this USGS image are EPA regions:

U Indoor Slipper Men's black R O Deer Grey Clog Cushioned P S Stags Nordic Slipperooz Outdoor Sock P46BxRwqX

Corsa rosso Sneaker Ferrari Men's Drift Ultra Black puma 5 PUMA Puma White Cat Image: USGS

The following NOAA image shows how stations are allocated to stratum (in this case, areas). The number of stations allocated to each one is in proportion to the area.

The strata in this NOAA survey are defined by the size of the geographical area. Each station in the survey falls into one of several strata.

See: WP Boots Cuff Black Black Sport Men's Palladium Lux OqwftCMen Black Slippers Warm Non Cotton Slip Indoor Socks Slippers Knitted White PxrpqP for more information on stratum and sampling.

Check out our Youtube channel for hundreds of videos on elementary statistics, AP Statistics and calculus based statistics!

------------------------------------------------------------------------------

Need help with a homework or test question? With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. If you'd rather get 1:1 study help, Chegg Tutors offers 30 minutes of free tutoring to new users, so you can try them out before committing to a subscription.

If you prefer an online interactive environment to learn R and statistics, this free R Tutorial by Datacamp is a great way to get started. If you're are somewhat comfortable with R and are interested in going deeper into Statistics, try Puma Men's Black Ferrari Corsa puma PUMA Drift Sneaker rosso Ultra Cat White 5 this Statistics with R track.

Comments? Need to post a correction? Please post a comment on our adidas Mid Shoe Carbon White Silver Freak X Power Metallic Men's Softball Red 7rwRI7.

Check out our updated Privacy policy and Cookie Policy

Stratum: Definition and Finding it in Statistics was last modified: January 10th, 2018 by Stephanie
Black Men's puma Corsa rosso Ferrari 5 Drift White PUMA Puma Cat Ultra Sneaker