A network provider investigated t he number of blocked intrusions to its network, and found that there were, on average, 45 blocked intr usions per day. After a change in firewall settings, the mean number of intrusions during the nex t 35 days was 42 with a standard deviation equal to 15.5. Perform a hypothesis test to determin e if the change in firewall settings reduced the number of intru sion

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