Unformatted text preview: of noise reduction device. Type 2 seemed to reduce the variability of the noise. However, the p-
vaiue for the interaction between the size of the car and the type of reduction noise was 0.006. We fail to reject the null hypothesis and state there was not enough evidence to cl '
interaction between the Wpe of noise reduction device and the size of the car. ...
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- Spring '10