After a pollution accident, 180 dead fish were recovered from a stream. Table 1.5.4 gives their lengths measured to the nearest millimeter.
(a) Using the grouped data formula, find the mean, variance, and standard deviation.
(b) Find the median for this grouped data and interpret.
Table 1.5.4 Length of Dead Fishes

Transcribed Image Text:

40-59 Length of Fish (mm) 1-19 20-39 31 80-99 7 60-79 45 59 Frequency 38