9. The data below are the compressive strength (in psi) of 80 aluminum-lithium alloy specimens. 105 221 183 186 121 181 180 143 97 154 153 199 158 228 174 208 181 174 120 168 167 141 245 158 131 193 154 115 160 176 207 110 180 163 133 190 194 133 156 123 134 178 76 167 184 135 229 146 218 157 101 171 165 172 158 169 199 151 142 163 145 171 148 237 158 201 160 175 149 87 160 150 135 196 200 176 150 170 118 149 (a) Construct a relative frequency and a cumulative frequency table for the above data starting with the class interval 70 – 89. (b) Compute the sample mean and sample standard deviation. (c) Construct a histogram of the compressive strength (in psi) data.
9. The data below are the compressive strength (in psi) of 80 aluminum-lithium alloy specimens. 105 221 183 186 121 181 180 143 97 154 153 199 158 228 174 208 181 174 120 168 167 141 245 158 131 193 154 115 160 176 207 110 180 163 133 190 194 133 156 123 134 178 76 167 184 135 229 146 218 157 101 171 165 172 158 169 199 151 142 163 145 171 148 237 158 201 160 175 149 87 160 150 135 196 200 176 150 170 118 149 (a) Construct a relative frequency and a cumulative frequency table for the above data starting with the class interval 70 – 89. (b) Compute the sample mean and sample standard deviation. (c) Construct a histogram of the compressive strength (in psi) data.
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Transcribed Image Text:9. The data below are the compressive strength (in psi) of 80 aluminum-lithium alloy
specimens.
105
221
183
186
121
181
180
143
97
154
153
199
181
174
120
168
167
141
245
228
174
158
176
110
163
131
154
115
160
208
158
133
207
180
190
193
194
133
156
218
123
134
178
76
167
184
135
229
146
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
(a) Construct a relative frequency and a cumulative frequency table for the above data
starting with the class interval 70 – 89.
(b) Compute the sample mean and sample standard deviation.
(c) Construct a histogram of the compressive strength (in psi) data.
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