The following data are scores reflecting the number of young cod that recruited (grew to the catchable size) to the North Sea population in different years (Beaugrand et al. 2003). Scores are adjusted magnitudes (without units) rather than actual fish numbers. The measurements are listed below and arranged from low to high rather than by year.

a. What was the mean score for number of recruits over this period?

b. What was the standard deviation in the score of number of recruits?

c. In what fraction of years did the score for the number of recruits fall within two standard deviations of the mean?

d. What is the median score of the number of recruits?

Transcribed Image Text:

5.0.5.0, 5.1,5.1, 5.2,5.2, 5.2,5.2, 5.2,5.2, 5.2,5.2, 5.2,5.2, 5.2,5.2, 5.3,5.3, 5.3,5.3, 5.3.5.3, 5.3,5.3, 5.4.5.4, 5.4,5.4, 5.4.5.4, 5.4.5.4, 5.4.5.4, 5.5,5.5, 5.5,5.5, 5.5,5.5, 5.5,5.5, 5.5,5.5, 5.5,5.5, 5.5,5.5, 5.6.5.6, 5.6.5.6, 5.6.5.6, 5.7.5.7, 5.7,5.7, 5.7,5.7, 5.7,5.7, 5.7,5.7, 5.8,5.8, 5.8,5.8, 5.8.5.8, 5.9.5.9, 5.9.5.9, 6.0.6.0, 6.06.0