Question

2.S.3 In a behavioral study of the fruitfly Drosophila melanogaster, a biologist measured, for individual flies, the total time spent preening during a 6-minute observation period. The following are the preening times (sec) for 20 flies:54 34 24 10 16 52 76 33 31 46 24 18 26 57 32 25 48 22 48 29 19 (a) Determine the mode (s). (b) Calculate the range. (c) Construct a dotplot of the data

Answer 1

Explanation:

The raw data given can be properly expressed by a frequency table. The frequency table formed from the data given is attached to this answer.

From the frequency table,

(a) The modes of the data are 24 and 48. Thus, the data is said to be bimodal.

(b) Range = height value - least value

= 76 - 10

= 66

Range = 66

(c) A dot plot is a pictorial graph of the plot of the given data. The plot of the given data is attached to this answer.