Chapter 4: Summary Statistics questions and answers

Chapter 4: Summary Statistics Mean - correct answer-The arithmetic average of a data set. Most common measure of central location. To calculate the mean - correct answer-Add up all the values in the data set and then divide by the number of observations. Notation - correct answer-series or system of written symbols used to represent numbers, amounts, or elements in something such as music or mathematics. Numerical summaries of shape are - correct answer-not covered because they are seldom used in practice. Gravitational center - correct answer-Mean X is the gravitational center of the distribution. Where the data would balance if placed on a seesaw. Susceptibility - correct answer-Small weight far from the center will counterbalace a large weight near the center. Three functions of the mean (A) - correct answer-It can be used to predict an individual value drawn at random from the sample. Three functions of the mean (B) - correct answer-It can be used to predict a value drawn at random from the population. Three functions of the mean (C) - correct answer-It can be used to predict the population mean. The mean from a frequency table - correct answer-Mean can be derived from a frequency table by calculating the weighted average of values with weights provided by the relative frequency (proportions) of each value using the formula. Sole reliance on a mean - correc