Question

Researchers at the Mayo Clinic found a significant association between hospital sound levels and patient healing (louder hospital sound level is associated with slower healing). Based on these findings, a new hospital installed a new flooring that is supposed to reduce the noise level in hospital corridors. Using α = 0.01, did the variance of noise level decrease? (use both methods) Problem 4: Mayors of nine communities started a watch program to reduce vandalism. The number of vandalism incidents before and after starting the watch program was collected for each community. Does the data collected show that the watch program was effective? (use both methods)

Sound Level in Decibels of Two Flooring Types (n = 5 mesurements)
New Flooring	Old Flooring
42	48
41	51
40	44
37	48
44	52

Mayors of nine communities started a watch program to reduce vandalism. The number of vandalism incidents before and after starting the watch program was collected for each community. Does the data collected show that the watch program was effective? (use both methods)

Number of Vandalisms Before and After Watch Program (n = 9)
City	Before	After
1	12	8
2	6	3
3	8	7
4	1	0
5	2	4
6	4	0
7	4	4
8	3	4
9	3	0

using excel

Answer 1