153 College protests of labor exploitation. Refer to the Journal of World-Systems Research (Winter 2004) study of 14 student sit-ins for a “sweat-free campus,” presented in Exercise 41 . The SITIN file contains data on the duration

(in days) of each sit-in, as well as data on the number of student arrests.

a. Use a scatterplot to graph the relationship between duration and number of arrests. Do you detect a trend?

b. Repeat part a , but graph only the data for sit-ins in which there was at least one arrest. Do you detect a trend?

c. Comment on the reliability of the trend you detected in part b .

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Resonance Frequency 1234567 979 1572 2113 2122 2659 2795 3181 8 3431 9 3638 10 3694 11 4038 12 4203 13 4334 14 4631 15 4711 16 4993 17 5130 18 5210 19 5214 20 5633 21 5779 22 5836 23 6259 24 6339 Source: Russell, D.A. "Basketballs as spherical acoustic cavities." American Journal of Physics, Vol. 48, No. 6, June 2010 (Table I).