Instruction: Please help me to answer all the questions correctly. A pollster wants to find out if citizens are satisfied with the city council. Which procedure would be most appropriate or obtaining a statistically unbiased sample? a. placing an advertisement in a magazine asking for mail-in responses b. surveying people whose names have been randomly chosen from the telephone book. c. interviewing people at a popular local shopping center d. mailing a questionnaire to people whose names have been chosen randomly from a list of costumers in a convenient store at night. In a recent study, a random sample of 250 trees that had been planted five years ago along the Oregon coast showed a significant negative relationship between the distance from the shoreline and the height of the tree. The distance from the shoreline is

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Compound Probability

Compound probability can be defined as the probability of the two events which are independent. It can be defined as the multiplication of the probability of two events that are not dependent. 

Tree diagram

Probability theory is a branch of mathematics that deals with the subject of probability. Although there are many different concepts of probability, probability theory expresses the definition mathematically through a series of axioms. Usually, these axioms express probability in terms of a probability space, which assigns a measure with values ranging from 0 to 1 to a set of outcomes known as the sample space. An event is a subset of these outcomes that is described. 

Conditional Probability

By definition, the term probability is expressed as a part of mathematics where the chance of an event that may either occur or not is evaluated and expressed in numerical terms. The range of the value within which probability can be expressed is between 0 and 1. The higher the chance of an event occurring, the closer is its value to be 1. If the probability of an event is 1, it means that the event will happen under all considered circumstances. Similarly, if the probability is exactly 0, then no matter the situation, the event will never occur.