请问给定离散概率分布,怎么计算均值和标准差啊(excel里面)?数据如下
x p(x)
159 | 0.03% |
160 | 0.58% |
161 | 0.17% |
162 | 0.37% |
163 | 0.44% |
164 | 0.34% |
165 | 2.60% |
166 | 1.02% |
167 | 1.21% |
168 | 3.16% |
169 | 1.14% |
170 | 13.20% |
171 | 3.59% |
172 | 7.48% |
173 | 7.47% |
174 | 4.34% |
175 | 13.55% |
176 | 5.82% |
177 | 4.03% |
178 | 8.49% |
179 | 2.41% |
180 | 7.41% |
181 | 2.65% |
182 | 2.81% |
183 | 2.98% |
184 | 0.92% |
185 | 1.79% |
谢谢!