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STAT 302 final exam Study Guide Solutions

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STAT 302 final exam Study Guide Solutions population - ANSWER-the entire group the researcher is interested in sample - ANSWER-the group of people we actually collect data on parameter - ANSWER-a numerical summary of the entire population ex: mean, proportion statistic - ANSWER-a numerical summary of only the sample variable - ANSWER-a characteristic of an individual (must vary from individual to individual) categorical variable - ANSWER-a variable that places an individual into one of several groups quantitative variable - ANSWER-a variable measuring amount or quantity distribution - ANSWER-the values a variable takes along with their frequencies normal distribution - ANSWER- left-skewed distribution - ANSWER- bimodal distribution - ANSWER- uniform distribution - ANSWER- average - ANSWER-mean Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024 Copyright ©Stuvia International BV Page 2/8 Xbar = sigmaX/n median - ANSWER-middle number (after ordering) resistant - ANSWER-not strongly influenced by extreme values like outliers influential - ANSWER-noticeably shifts the value of a statistic like the sample mean range - ANSWER-max-min measures spread, ignores values of data points, not robust IQR - ANSWER-Q3-Q1 the range of the middle 50% of data, measures spread, is robust standard deviation - ANSWER-typical distance from mean, measures spread, not robust association - ANSWER-particular values of one variable m

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Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




STAT 302 final exam Study Guide

Solutions


population - ANSWER✔✔-the entire group the researcher is interested in


sample - ANSWER✔✔-the group of people we actually collect data on


parameter - ANSWER✔✔-a numerical summary of the entire population


ex: mean, proportion


statistic - ANSWER✔✔-a numerical summary of only the sample


variable - ANSWER✔✔-a characteristic of an individual (must vary from individual to individual)


categorical variable - ANSWER✔✔-a variable that places an individual into one of several groups


quantitative variable - ANSWER✔✔-a variable measuring amount or quantity


distribution - ANSWER✔✔-the values a variable takes along with their frequencies


normal distribution - ANSWER✔✔-


left-skewed distribution - ANSWER✔✔-


bimodal distribution - ANSWER✔✔-


uniform distribution - ANSWER✔✔-


average - ANSWER✔✔-mean


Copyright ©Stuvia International BV 2010-2024 Page 1/8

, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




Xbar = sigmaX/n


median - ANSWER✔✔-middle number (after ordering)


resistant - ANSWER✔✔-not strongly influenced by extreme values like outliers


influential - ANSWER✔✔-noticeably shifts the value of a statistic like the sample mean


range - ANSWER✔✔-max-min




measures spread, ignores values of data points, not robust


IQR - ANSWER✔✔-Q3-Q1




the range of the middle 50% of data, measures spread, is robust


standard deviation - ANSWER✔✔-typical distance from mean, measures spread, not robust


association - ANSWER✔✔-particular values of one variable more likely to occur with certain values of

another


independent - ANSWER✔✔-zero association


P(A and B) = P(A)P(B)


P(A | B) = P(A)




Copyright ©Stuvia International BV 2010-2024 Page 2/8

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