A geneticist counted the number of bristles on a certain region of the abdomen of the fruitfly Drosophila melanogaster. The results for 119 individuals were as shown in the table.

(a) Find the median number of bristles.
(b) Find the first and third quartiles of the sample.
(c) Make a boxplot of the data.
(d) The sample mean is 38.45 and the SD is 3.20. What percentage of the observations fall within 1 SD of the mean?
(e) What percentage of the observations fall between the quartiles identified in part (b)?

Transcribed Image Text:

Number Number of Number of Number bristles of flies of bristles 29 30 31 32 lies 38 39 18 13 10 15 10 41 42 43 34 35 36 37 45 12 46