These people worship the Thunderbird because they think it will save them from crisis, protect them in wars. Indian tribes such as Kwakwaka’wakw believed that their ancestors made a deal with the Thunderbird that the bird will help them when there is a food crisis, and in return, their tribe will worship and admire the Thunderbird as a god. They put the Thunderbird on the top of their totem, put it into their artworks, and have ceremonies for it. All the purpose of doing these are because of this deal they made in the
Random sampling Random sampling is one simple method of controlling some of the variables. The stratified random sample controls for specific variables by choosing subjects from different levels or categories. The following examples show examples of this process. • Equal numbers of students could be chosen from the honors and regular classes. This controls for varying achievement levels.
Simple random sampling Simple random sampling is the fundamental sampling technique where a group of subjects, are being selected, from a larger group , known a population. Each individual is elected entirely by chance and each member of the population has an equivalent chance at being selected. This method works finest for a relatively homogenous
Some populations are also too large so that all their characteristics cannot be measured. 4. Better rapport An effective research study requires a good rapport between the researcher and the respondents. Provided the population of the sample is a reasonable size, in Sampling there is generally a better relationship and communication between the researcher and the respondents compared to the case that the whole population is
Introduction: The hawksbill sea turtle (Eretmochelys imbricata) belongs to the family Cheloniidae and has a worldwide distribution occurring in tropical and subtropical waters around the world. The species carries this common name because of their narrow, pointed beak. This turtle is also named tortue imbriquée in French, and tortuga de carey in Spanish. Description: The hawksbill has an elongated head with a sharp and curved beak-like mouth. Their top shell (carapace) is dark to golden brown.
Randomization ensures that each patient has an equal chance of receiving any of the treatments under study, generate comparable intervention groups, which are alike in all the important aspects except for the intervention each groups receives. It also provides a basis for the statistical methods used in analyzing the data. The basic benefits of randomization are as follows: it eliminates the selection bias, balances the groups with respect to many known and unknown confounding or prognostic variables, and forms the basis for statistical tests, a basis for an assumption of free statistical test of the equality of treatments. In general, a randomized experiment is an essential tool for testing the efficacy of the
Common Name: Tobacco Hornworm Scientific Name: Manduca Sexta Habitat Information: The habitat of the Tobacco hornworm rages from Southern Canada all the way to down to Argentina. They are most commonly found in the Southern states of the United States, specifically those located on the Gulf Coast. The Tobacco Hornworm lives on the plant on which its egg was first laid. Diet: The Tobacco Hornworm only feeds on solanaceous plants, which include tomato, eggplant, peppers, potatoes, and tomatillo. This group of plants also includes tobacco and petunia plants, as well as poisonous weeds such as nightshade, Jimsonweed and mandrake.
Typically, group research employing randomization will initially possess higher external validity than studies that do not use random selection/assignment. The threats that adversely affect an external validity study are: An interaction between how the subjects were selected and the treatment can occur. If subjects are not randomly selected from a population, then their particular characteristics may bias their performance and the study's results may not be applicable to the population or to another group that more accurately represents the characteristics of the population. Pretesting subjects in a study may cause them to react more/less strongly to the treatment than they would have had they not experienced the pretest. Setting: The performance of subjects in some studies is more a product or reaction to the experimental setting than it is to the independent variable.
Orchids (Orchidaceae family) are the largest and most diverse of the flowering plant families, with over eight hundred described genera and 25,000+ species. There are also over 100,000 hybrids and cultivars produced by horticulturalists, created since the introduction of tropical species to Europe. Orchids are found on all continents except Antarctica. The great majority are to be found in the tropics, mostly Asia, South America, and Central America. Some are found above the Arctic Circle, in southern Patagonia, and even on Macquarie Island, close to Antarctica.
Unlike the antlers of a deer, bovid horns don’t branch and are never shed. Horns are present in males of all bovid species and some female. So, the horns they acquire at a young age are the ones they’re stuck with for life. Genus and Geographic Location: The Bovidae are the most diverse group of living mammals, with 143 living species and over 300 known extinct species. The present classification scheme for bovids recognizes eight subfamilies; bovinae, antilopinae, reduncinae, hippotraginae, ancelaphinae, caprinae aepycerotinae, and cephalophinae, but all bovids possess some carefully related features.