Question

Anagram puzzles involve sets of scrambled letters that must be rearranged to form words. A standard intelligence test employs these puzzles as an aid inassessing verbal ability. Several years ago, an undergraduate noticed that some versions of the intelligence test employed anagram puzzles with lower-caseletters, and some versions employed anagram puzzles with upper-case letters. She performed experiments, with college students as participants, to examinetimes for completion for the two versions. The histogram below summarizes information about the times for completion for the 25 students she tested on thelower-case version,FrequencyTime for completion (in seconds)Based on the histogram, find the proportion of times for completion in the sample that are at least 900 seconds. Write your answer as a decimal, and do notround your answer.

Answer 1

By the histogram, 6 + 3 + 3 = 12 students completed the puzzles in at least 900 seconds.

This represents a proportion of 12/25 = 0.48