Plese help me solve 7.2.2
Posted: Mon Apr 11, 2022 6:23 am
Plese help me solve 7.2.2
7.2.1 WP Consider the compressive strength data in Table 6.2. What proportion of the specimens exhibit compressive strength of at least 200 psi? What is the population parameter estimated here?
7.2.2 WP Consider the synthetic fiber in the previous exercise. How is the standard deviation of the sample mean changed when the sample size is increased from n= 6 to n= 49?
TABLE 6.2 Compressive Strength (in psi) of 80 Aluminum-Lithium Alloy Specimens 105 221 183 186 121 181 180 143 97 154 153 174 120 168 167 141 245 228 174 199 181 158 176 110 163 131 154 115 160 208 158 133 207 180 190 193 194 133 156 123 134 178 76 167 184 135 229 146 218 157 101 171 165 172 158 169 199 151 142 163 145 171 148 158 160 175 149 87 160 237 150 135 196 201 200 176 150 170 118 149
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7.2.2 WP Consider the synthetic fiber in the previous exercise. How is the standard deviation of the sample mean changed when the sample size is increased from n= 6 to n= 49?
TABLE 6.2 Compressive Strength (in psi) of 80 Aluminum-Lithium Alloy Specimens 105 221 183 186 121 181 180 143 97 154 153 174 120 168 167 141 245 228 174 199 181 158 176 110 163 131 154 115 160 208 158 133 207 180 190 193 194 133 156 123 134 178 76 167 184 135 229 146 218 157 101 171 165 172 158 169 199 151 142 163 145 171 148 158 160 175 149 87 160 237 150 135 196 201 200 176 150 170 118 149