47 52 57 62 67 72 77 Test Scores Q Use the Empirical Rule to answer the following questions. a. The mean is b. The standard deviation is C. % of the test scores are between 57 and 67. d. % of the test scores are between 52 and 72. e. % of the test scores are between 47 and 77. % of the test scores are between 62 and 67. g. % of the test scores are less than 62. h. % of the test scores are less than 67