The data below represent the weights (in kg) of 30 participants in a study about a drug.

57	59	61	63	64
65	73	74	74	74
75	77	77	81	82
82	82	83	83	85
87	89	91	93	96
96	98	99	99	101

1. Carefully construct, draw and label a histogram of these data. You can draw the histogram on ordinary paper, instead of graph paper, but take care to ensure reasonable accuracy.

2. Find the mean and the modal group. You are given that the sum of the data is 2,420

3. Find the median and the lower quartile.

4. Comment on the data, given the shape of the histogram and the measures which you have calculated.