Problem

College protests of labor exploitation. Refer to the Journal of World-Systems Research (Wi...

College protests of labor exploitation. Refer to the Journal of World-Systems Research (Winter 2004) study of student “sit-ins” for a “sweat-free campus” at universities, presented in Exercise.

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

Resonance	Resonance
1	979
2	1572
3	2113
4	2122
5	2659
6	2795
7	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

Based on Russell, D. A. “Basketballs as spherical acoustic cavities.” American Journal of Physics , Vol. 48, No. 6, June 2010.

Exercise. 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.

Recall that the SITIN file contains data on the duration (in days) of each sit-in, as well as the number of student arrests. The data for 5 sit-ins in which there was at least one arrest are shown in the table (p. 548). Let y = number of arrests and x = duration.

a. Give the equation of a straight-line model relating y to x.
b. SPSS was used to fit the model to the data for the 5 sitins. The printout is shown on page 538. Give the least squares prediction equation.

Sit-In
University
Duration (days)
Number of Arrests
12
Wisconsin
4
54
14
SUNY Albany
1
11
15
Oregon
3
14
17
Iowa
4
16
18
Kentucky
1
12
12
Wisconsin
4
54
Based on Ross, R. J. S. “From antisweatshop to global justice to antiwar: How the new new left is the same and different from the old new left.” Journal of Word-Systems Research , Vol. X, No. 1, Winter 2004.
c. Interpret the estimates of β0 and β1 in the context of the problem.
d. Find and interpret the value of s on the printout.
e. Find and interpret the value of r2 on the printout.
f. Conduct a test to determine whether number of arrests is positively linearly related to duration. (Use α =.10)