A nationwide survey found out that the average time that college students spent on their personal computer is 7.5 hours per week. A random sample of 28 college students showed that they spent 7.1 hours per week using their computers with a standard deviation of 0.7 hours. Test whether the average number of hours spent by the 28 college students is significantly lower than the national average of 7.5 hours.

What is the computed test statistics? " Your answer Formulate null and alternative hypotheses. (Write it in mathematical symbols, t.e., u = 1, u > 1) " Your answer What is your conclusion? * Your answer What is your decision? (Reject Ho or Do not reject Ho) " Your answer What is the appropriate test statistics? (2 - test or T - Test) " Your