Someone help with my math worksheet “a fine line”

Dr. cooper just started an experiment. he will collect data for 8 days. how many hours is this

How do you summarize data in a two-way frequency table?

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample