Statistics Workbook For Dummies with Online Practice, 2nd Edition

Index

A

• addition rule, 237–239, 251–252
• alternative hypothesis (Ha), 178
• anecdotes, 307
• average. See mean
• average, of histograms, 47

B

• bar graphs (bar charts), 32–36, 40–42
• bell curve. See normal distribution
• bell-shaped histograms, 47
• bias, 65, 146, 225, 302–303
• bimodal histograms, 47
• binomial distribution, 105–116
  • binomial table, 314–318
  • mean and variance of, 110–111, 115–116
  • overview, 105–106, 114
  • probabilities for large sample cases (normal approximation), 112–113, 116
  • probabilities for medium sample cases, 109–110, 115
  • probabilities for small sample cases, 107–108, 114–115
• binomial table, 314–318
• box plots, 55–57, 67–68

C

• categorical data, 7–15
  • bar graphs, 32–36, 40–42
  • counts and percents, 11–12, 15
  • frequency, 7–9, 13–14
  • independence of variables, 246–249, 255–257
  • percentages, 9–11, 14–15
  • pie charts, 27–32, 37–40
• center, measures of, 18–20, 24–25
• central limit theorem (CLT), 126–128
  • finding probabilities with, 129–130, 134–135
  • overview, 128, 133–134
• coefficient of variation, 65
• complex fractions, 281
• conditional probabilities
  • key words for, 242
  • two-way tables, 242–245, 252–255
• confidence intervals, 151–162, 169–174
  • components of, 151
  • for difference of two means, 158–160, 165–166
  • for difference of two proportions, 160–162, 166–167
  • evaluating, 173–174, 176
  • interpreting, 169–173, 175–176
  • overview, 151–154, 163
  • for population mean, 154–156, 163–164
  • for population proportion, 156–158, 164
  • steps for calculating, 152
• confounding variables, 225, 230, 305
• correlation, ...