Different types of Sampling Method

Sampling Methods:-

1) Probability Sampling Method
2) Non-Probability Sampling Method

Probability Sampling Methods –

1) A simple random sample:- A simple random sample is obtained by choosing elementary units in search a way that each unit in the population has an equal chance of being selected. A simple random sample is free from sampling bias. However, using a random number table to choose the elementary units can be cumbersome. If the sample is to be collected by a person untrained in statistics, then instructions may be misinterpreted and selections may be made improperly. Instead of using a least of random numbers, data collection can be simplified by selecting say every 10th or 100th unit after the first unit has been chosen randomly as discussed below. Such a procedure is called systematic random sampling.

Golden Rule of Photography - The Rule of Thirds

One of the most popular 'rules' in photography is the Rule of Thirds. It is also popular amongst artists. The Rule of Thirds is based on the fact that the human eye is naturally drawn to a point about two-thirds up a page. It is a compositional rule of thumb in visual arts such as painting, photography and design.

Characteristics of Camera Lens

-Focal length: Light rays which are parallel to the axis of the lens, after passing through a convex lens meet at a point on the other side of the lens. This point is called as a focus of the lens. The distance between focus and the optical centre (or node) of the lens is called as focal length of that lens. Focal length of a camera lens may also be defined as the minimum practicable distance between film/image sensor and (the optical centre of) the lens. Focal length of a camera lens is usually marked in mm on the front of the lens. Focal length remains fixed for a given lens (other than zoom lens). SLR camera may take lenses having different focal lengths.

Benefits of Advertising

1. Economic Benefits of Advertising: Advertising can play an important role in the process by which an economic system guided by moral norms and responsive to the common good contributes to human development. Advertising can be a useful tool for sustaining honest and ethically responsible competition that contributes to economic growth in the service of authentic human development. Advertising does this, among other ways, by informing people about the availability of rationally desirable new products and services and improvements in existing ones, helping them to make informed, prudent consumer decisions, contributing to efficiency and the lowering of prices, and stimulating economic progress through the expansion of business and trade. All of these can contribute to the creation of new jobs, higher incomes and a more decent and humane way of life for all.

How To Get Good Pictures - Camera Composition

-Headroom: Enough room for the subject's head. Too low in the frame (too much headroom) makes them appear short. Not enough headroom makes them look tall and scrunched. Correct headroom gives the subject just enough space around their head to make them look comfortable.

-Eye placement: Should be in the top third of the screen (see rule of thirds). You want the viewer not to notice the camera-work so, make it look natural and standard.