Statistics All-in-One For Dummies

Index

Symbols and Numerics

• * (asterisk), 144

• σ (standard deviation of an entire population), 76, 313–314

• 25th percentile (first quartile/Q₁), 88

• 50th percentile. See median (50th percentile)

• 75th percentile (third quartile/Q₃), 88

A

• ACT scores, examining, 86–88
• addition rule
  • about, 180–182
  • simplifying with mutually inclusive events, 185
• age trend project example, for pie charts, 103–108
• alternative hypothesis, 42, 343
• analyzing
  • data from experiments, 425–427
  • results from surveys, 405
• anecdotes, 21
• anonymity, for surveys, 403
• asterisk (*), 144
• average. See mean
• avoiding probability misconceptions, 189–190
• axes, in histograms, 128–129

B

• bar graphs
  • about, 108
  • evaluating, 112
  • lotto example, 110
  • pet peeves example, 111–116
  • scales on, 110–111
  • transportation expenses example, 108–110
• behavior, studying using t-tables, 258
• bell curve, 38
• best-fitting line. See regression line
• bias
  • avoiding in experiments, 422
  • defined, 32
• binomial distribution
  • about, 199
  • checking, 204
  • finding
    • binomial probabilities using formulas, 207–210
    • probabilities using binomial tables, 210–212
  • identifying binomials, 203–206
  • independence of trials, 205
  • mean of binomials, 212–213
  • number of trials, 204
  • practice questions answers and explanations, 214–215
  • probability of success (p) changes, 205–206
  • quiz, 216–217
  • standard deviation of binomials, 212–213
  • success vs. failure, 205
• binomial table
  • finding binomial probabilities using, 210–212
  • illustrated, 507–512
• binomials ...