| 1.1 Among the digits 1,2,3,4,5 first one is chosen, and then a second selection is made among the remaining four digits. Assume that all twenty possible results have the same probability. Find the probability that an odd digit will be selected. $\frac{3}{5}$ The second time $\frac{3}{5}$ The third time $\frac{3}{10}$ |
Selection numbers refer to the process of choosing a specific number of individuals or items from a larger group for a particular purpose or study.
Selection numbers are important in science because they ensure that the chosen sample is representative of the larger population, helping to draw accurate conclusions and make generalizations about the entire group.
The determination of selection numbers depends on various factors such as the size of the population, the level of variation within the population, the desired level of accuracy, and the research question being investigated. Statistical methods and sampling techniques are often used to determine the appropriate selection numbers.
Random selection numbers involve choosing individuals or items from a population at random, without any particular criteria. This helps to minimize bias and ensure a representative sample. Non-random selection numbers, on the other hand, involve choosing individuals or items based on specific criteria, such as age, gender, or location.
Some challenges in determining selection numbers include limited resources, time constraints, and the complexity of the population being studied. It can also be difficult to determine the appropriate level of accuracy and representativeness needed for the study.