Chapter 4 - Summary Statistics questions and answers latest 2024

What are three main measures of central location? - correct answer-1) Mean 2) Median 3) Mode What is a mean? - correct answer-the gravitational center of the distribution What is a mode? - correct answer-the most frequently occurring value in the data ==> usually only used in large data sets with many repeating values What is the median? - correct answer-the central value in the order array of the data Describe the notation for: 1) sample size 2) the variable (i.e. age) 3) the value of individual i for variable X 4) sum of all values - correct answer-1) n 2) X 3) xi <==i is a subscript 4) Capital sigma What is the "sample mean" ? (2 definitions) - correct answer-1) traditional measure of central location (of the sample) 2) the balancing point of distribution (see Biostatistics Study Chart and Diagrams) ==> it is the arithmetic average = sum of values and divide by n What is the notation for t