Select a sample of 20 individuals and test the hypothesis H 0 : 2 = 225

Select a sample of 20 individuals and test the hypothesis H₀ : σ² = 225 for IQ level. Use α = 0.05. Assume the variable is normally distributed.

Data from data bank appendix B

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Data Bank 882882&ID number 01 02 03 05 06 07 08 09 10 11 12 13 14 Age 27 18 32 24 19 56 65 36 43 47 48 25 63 37 Educational level Smoking status Exercise Weight 132 196 109 Serum cholesterol 170 187 Systolic pressure Sodium 2 1 1 120 193 126 M 1 0 1 145 210 120 S 2 0 0 118 196 128 115 135 F M 2 0 1 162 208 129 108 142 M M 1 2 0 106 188 119 106 133 F S 1 0 0 143 206 136 111 138 F W 1 2 0 160 240 131 99 140 M W 2 1 0 215 215 163 106 151 M D 1 0 1 127 201 132 111 134 F M 1 1 1 215 138 109 135 F D 3 1 2 199 148 115 146 M D 2 2 3 210 115 114 141 F S 0 1 0 242 149 101 152 F D 2 0 3 193 142 109 144 M M Gender 118 136 F 105 137 M Marital status