A recent national survey found that high school students watched an average ( Mean ) of 6.8 videos per month . A random sample of 100 college students revealed that the mean number of videos watched...

A recent national survey found that high school students watched an average

( Mean ) of 6.8 videos per month . A random sample of 100 college  students revealed that the mean number of videos watched last month was 6.2 with standard deviation 0.5 . At the 0.05 level of significance , can we conclude that college students watch  fewer videos a month than high school students ?