1. The following are data on the observed compressive strength in psi of 50 samples of concrete interlocking blocks. 136 92 115 118 121 137 132 120 104 125 119 115 101 129 87 108 110 133 135 126 127 103 110 126 118 82 104 137 120 95 146 126 110 119 105 132 126 118 100 113 106 125 117 102 146 129 124 113 95 148 Determine the following: 1. Range 2. Class Interval 3. Class limits 4. Frequency 5. Relative Frequency

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