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Use the following data on length of service in days (X) and cost per day in dollars (Y) for 10 patients on a home health care program.
Patient Number
Length of Service, X
Cost per Day, Y
1
310
35.00
2
89
34.60
3
22
102.60
4
9
136.20
5
120
69.50
6
99
79.60
7
63
140.20
8
170
45.40
20
81.3
10
198
29.50
(a) State which model the data follow and plot the scatter diagram.
(b) Do you expect the r to be positive or negative from looking at the scatter diagram? Should b be positive or negative?
(c) Give a 95% confidence interval for p.
(d) Test the Ho : p = 0 and H0 : β = 0. Did you get the same P value?
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