A recent national survey found that high school students watched average of 6.8 DVDs per month. A random sample of 25 college students revealed that number of DVDs watched last month was 7.11, with the standard deviation of 0.76. At the .05 significance level, can we conclude which college students watch fewer DVDs a month than high school students?
Determine the H0 and Ha. Calculate the test statistic. Determine the critical value? Do you reject or fail to reject the null hypothesis and why.