The mean is found by adding the time it takes Greg each day and then diving by the number of days: 27+25+32=84. 84/3=28 min it takes Greg 32 min on the third day
0-5 because 25th percentile can also be known as the 1st quartile or the first 25% of it. so since the medium is 8 then it would be the first interval or 0-5.