28 students take a statistics test and receive the following grades.

57 75 90 70 60 61 85

65 81 83 72 63 81 70

100 82 79 78 82 78 87

98 58 91 84 90 83 81

Using Chebyshevs theorem and the emperical rule, how many values would you expect to fall

within two standard deviations of the mean? How many values actually fall within two standard

deviations the mean?