A new report claims that the mean daily time spent online in Vietnam is 6.63 hours. Researchers believe that the mean daily time spent is actually much larger and pulls a random sample of 74 adults in Vietnam. The sample had a mean daily time spent online of 6.73 hours with a standard deviation of 0.58 hours. Complete one-sample t -test for population means at a significant level of = 5 % . (a) The null hypothesis is = 6.63 = 6.73 x = 6.73 x = 6.63 (b) The alternative hypothesis is x > 6.63 x < 6.63 x = 6.63 > 6.63 (c) What is the test statistic value? Round answer to 3 decimal places (d) What is the P -value? Round answer to 4 decimal places (e) What is the correct conclusion? We reject the null hypothesis at the 5 % significance level We fail to reject the null hypothesis at the 5 % significance level