Keith filled his gas tank three times last week. here are the amounts of gas he bought (in gallons).
12.2
,
8.72
,
10
what is the total amount of gas keith bought last week?

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