Stats exam 1 Notes PDF

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Notes on material given in exam 1...

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Statistics Exam 1 Discrete: Finite # of values; countable. Continuous: infinite # possible values. Statistic: Sample of population. Parameter: entire population Sampling- Convenience: ex. 1st 50 customers chosen. Cluster: all teachers from 2 buildings. Simple random: group chosen using random #s. Systematic: every 100th selected. Stratified: separated into groups, select from each group. Variables: # of things in question; ex. # of fatalities for highway, railway, aircraft, and railway accidents. Scatterplot: / = strong positive, \ = negative. Scattered = no association. Explanatory = horizontal, responsible = vertical Boxplot: 5# sum: smallest value, quartile 1, median (Q2), Q3, largest value Lower fence: Q 1 – 1.5(IQR) Upper fence: Q 3 + 1.5(IQR) IQR= Q3 – Q1 Which more consistent? Smaller standard deviation Discrete Prob must add up to 1; all # between 0 and 1...