1) the average growth of a certain variety of pine trees is 10.1 inches in three years. A biologist claims that a new variety will have a greater three year growth. A random sample of 25 of the new variety has an average three year growth of 10.8 inches and a sample standard deviation of 2.1 inches. At the 5% level of significance the null hypothesis is: a) not rejected since the test statistic is less than critical value 2.064 b)not rejected since the test statistic is less than the critical value 1.708. c) not rejected since the test statistic is less than the critical value of 1.711. d) rejected because the test statistic is greater than the critical value 1.645. E) rejected because the test statistic is less than the critical value 1.711