please help me with those questions

a) Does Internet delay vary by time of day? It is reasonable to believe that during day time (business hours) the delay will be higher than during night (non business hours). You are to use ping to determine if the cross-country (so, Florida to a west coast host) RTT varies as a function of time of day. For full credit, you need to show that your result (if, indeed, the average delay is found to be lower at night than day) is statistically significant. Please do not flood a host with tens of thousands of pings at a high rate, this is not necessary for this problem. Give a screenshot of the summary of any relevant collected data