Friends Kevin and Felicity each selected a sample of 20 crossword puzzles

MATHEMATICS · Multi-part · AP · AP Statistics · Exploring One-Variable Data · Exploring One-Variable Data

Problem

Friends Kevin and Felicity each selected a sample of 20 crossword puzzles. The times they took, in minutes, to complete each puzzle were:
KevinFelicity
37 53 47 33 3933 36 41 26 52
49 37 48 32 3638 49 57 39 44
39 42 34 29 5248 25 34 27 53
48 33 56 39 4138 34 35 50 31
(1) Find the mean of each data set. (2) Find the standard deviation for each person. (3) Who generally solves crossword puzzles faster? (4) Who is more consistent in their time taken to solve the puzzles?

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