terms 3
This term is ised to desribe when part of the population has reduced chance of bring included in a sample. FOr example, a researcher wants to study the commuting habits of residents in a city, They decided to survey only people who visit the city central train station during morning rush hours (6AM to 9AM)
Undercoverage
This sample method is based on a group of participants who choose to be part of a study or survey,rather then being selected by the researcher. For, a news website wants together opinions about a proposed city tax increase. They posted an online poll asking readers to respond with their views.
Voluntary Sample
This is used when one event is not affecting the other event.For example what is the probability that a coin will land on heads and then will land on heads again?
Independent Event
This trem, is used when the percent of data less than or equal to a contain data value. For example, the salaries of a company is 29000,32000,34000,34000,34000,34000,35000,39000,43000,67,000,185,000. And the person who makes 43000 is at the 83rd percent of salaries
Percentile
This is used when one event does affect the other event. For example you have a bag of 17 marbles, four are blue, 6 are green, 2 are red, and others are yellow. What is the probability of drawing a red marble,putting it aside, and then drawing a green marble?
Dependent Event
What are the four main concepts of describing association. For example some ways to describe the concepts is the slope of the graph positive or negative, is the form of the graph linear or nonlinear, is the data strong, moderate, or weak and which is explanatory or response.
Direction,Form,Strength,and Variables
What formula do you use for a conditional probability question. For example, two fair dice are rolled and the sum of the numbers is observed. What is the probability that the sum is at least 9 if it is known that a 5 was rolled. In probability, this is written as A given B, where the probability of A happening depends on that of B happening
P(B|A)=P(AnB)/P(B)
This term is used to measure of how likely an event is likely to occur. For example, today there is a 60% percent chance of rain.
Probability
This sampling method involves dividing the populations into subpopulations. For example, a university wants to survey 1,000 students to understand their sanctification with campus facilities. The student population consists of 10,000 students, divided by year levels
Stratified Random Sample
This term is used when a large group of people is being studied in a sample.For example, a schools principal wants to estimate the average time students spend on homework each day. The school has 1,000 students across grades 6 to 12.
Population
This sample method is based on whats convenient at the moment, most easily accessible. For example, a professor wants to study students eating habits at a university. Instead of randomly selecting students from the entire university population, the professor surveys students in their own class because they are readily available.
Convenience Sampling