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Common Verbal Phrases Associated with Probabilities (Psychonomic Science, 1967, Vol. 9)

• Rank                                                                Mean                    Range
• 1.            Highly probable                                .89                          .60-.99
• 2.            Very likely                                           .87                          .45-.99
• 4.            Quite likely                                         .79                          .30-.99
• 5.            Usually                                                 .77                          .15-.99
• 6.            Good chance                                     .74                          .25-.96
• 8.            Likely                                                     .72                          .25-.99
• 12.          Fairly likely                                          .66                          .15-.95
• 18.          Fair chance                                         .51                          .20-.85
• 25.          Uncertain                                            .40                          .08-.90
• 26.          Possible                                               .37                          .01-.99
• 29.          Rather unlikely                                  .24                          .01-.75
• 31.          Unlikely                                                .18                          .01-.45
• 32.          Not much chance                             .16                          .01-.45
• 36.          Improbable                                        .12                          .01-.40
• 38.          Very unlikely                                      .09                          .01-.50
• 40.          Highly improbable                           .06                          .01-.30