What is the best way of choosing a sample to statistically represent a population? why? what is a biased sample? how can biased sampling affect the statistical study of a population

give two or more real world examples of biases sampling leading to unexpected or unfavorable outcomes. in each case, how could the sample have been improved to make a more accurate inference about the population?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

Abdul is making a map of his neighborhood he knows the following information: his home, the middle school, and high school are all on the same street. his home, the elementry school, and his friends house are on the same street. the angle between the elementary school, middle school, and his home is congruent to the angle between his friends house, the high school, and his home. what theorem can abdul use to determine the two triangles are similar? a- side side side similarity theoremb- angle angle similarity theoremc- corresponding parts of similar triangles are congruentd- pieces of right triangles similarity theorem