Update 假设检验

notebook_必备数学基础/假设检验章节/假设检验.ipynb

@@ -34,7 +34,7 @@
    "metadata": {},
    "source": [
     "### 假设校验的基本思想\n",
-    "<img src=\"assets/20201114091803.png\" width=\"70%\">"
+    "<img src=\"assets/20201114091803.png\" width=\"50%\">"
    ]
   },
   {
@@ -130,7 +130,7 @@
    "metadata": {},
    "source": [
     "### 左侧检验与右侧检验\n",
-    "<img src=\"assets/20201114095426.png\" width=\"100%\">"
+    "<img src=\"assets/20201114095426.png\" width=\"70%\">"
    ]
   },
   {
@@ -147,7 +147,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src=\"assets/20201114100216.png\" width=\"70%\">"
+    "<img src=\"assets/20201114100216.png\" width=\"30%\">"
    ]
   },
   {
@@ -202,7 +202,7 @@
    "source": [
     "### 总体均值检验\n",
     "什么时候用Z检验，什么时候用T检验\n",
-    "<img src=\"assets/20201114101438.png\" width=\"70%\">\n",
+    "<img src=\"assets/20201114101438.png\" width=\"50%\">\n",
     "一般是用T检验"
    ]
   },
@@ -320,10 +320,10 @@
    "source": [
     "这里是双侧，即二分之一α，1-α/2=0.975，查表\n",
     "<br>网上搜索：统计分布临界值\n",
-    "<img src=\"assets/20201115111943.png\" width=\"70%\">\n",
+    "<img src=\"assets/20201115111943.png\" width=\"50%\">\n",
     "<br><br>\n",
     "1.9+0.6=1.96，统计量为10.4比1.96大，意味着面积肯定小于1.96临界值（α/2）的面积\n",
-    "<img src=\"assets/20201115112520.png\" width=\"70%\">\n",
+    "<img src=\"assets/20201115112520.png\" width=\"50%\">\n",
     "根据双侧检验，若p值 < α/2，拒绝H0"
    ]
   },
@@ -366,7 +366,7 @@
     "<br>-2.83在-1.96左侧，也就是p值的面积小于α/2，在α = 0.05的水平上拒绝H0\n",
     "<br>结论：\n",
     "<br>有证据表明新机床加工的零件的椭圆度与以前有显著差异\n",
-    "<img src=\"assets/20201115151902.png\" width=\"50%\">"
+    "<img src=\"assets/20201115151902.png\" width=\"30%\">"
    ]
   },
   {
@@ -394,7 +394,7 @@
     "<br>2.4在1.645右侧，也就是p值的面积小于α，在α = 0.05的水平上拒绝H0\n",
     "<br>结论：\n",
     "<br>有证据表明新生产的灯泡的使用寿命有显著提高\n",
-    "<img src=\"assets/20201115152913.png\" width=\"50%\">"
+    "<img src=\"assets/20201115152913.png\" width=\"30%\">"
    ]
   },
   {
@@ -464,7 +464,7 @@
    "metadata": {},
    "source": [
     "网上搜索：t分布临界值表\n",
-    "<img src=\"assets/20201116212408.png\" width=\"70%\">"
+    "<img src=\"assets/20201116212408.png\" width=\"50%\">"
    ]
   },
   {
@@ -514,7 +514,7 @@
     "**实例1：**\n",
     "<br>\n",
     "有12名接种卡介苗的儿童，8周虐用两批不同的结核菌素，一批是标准结核菌素，一批是新制结核菌素，分别注射在儿童的前臂，两种结核菌素的皮肤浸润反应平均直径(mm)如表所示，问两种结核菌素的反应性有无差别。\n",
-    "<img src=\"assets/20201116215635.png\" width=\"70%\">"
+    "<img src=\"assets/20201116215635.png\" width=\"50%\">"
    ]
   },
   {
@@ -593,7 +593,7 @@
     "**实例2：**\n",
     "<br>\n",
     "25例糖尿病患者随机分成两组，甲组单纯用药物治疗，乙组采用药物治疗合并饮食疗法，二个月后测空腹血糖(mmoL)如表所示，问两种疗法治疗后患者血糖值是否相同?\n",
-    "<img src=\"assets/20201116221815.png\" width=\"70%\">"
+    "<img src=\"assets/20201116221815.png\" width=\"50%\">"
    ]
   },
   {
@@ -641,9 +641,9 @@
     "    <li>图示法:常用的图示法包括P-P图法和QQ图法。图中数据呈直线关系可认为呈正态分布，不呈直线关系可认为呈偏态分布\n",
     "    <li>偏度检验:主要计算偏度系数,H0O:G1=0,总体分布对称H1:G1#0,总体分布不对称\n",
     "\n",
-    "<img src=\"assets/20201117073547.png\" width=\"70%\">\n",
+    "<img src=\"assets/20201117073547.png\" width=\"30%\">\n",
     "    <li>峰值检验，主要计算峰度系数，H0: G2=0，总体分布为正态峰，H1：G2≠0，总体分布不是正态峰\n",
-    "    <img src=\"assets/20201117075130.png\" width=\"70%\">"
+    "    <img src=\"assets/20201117075130.png\" width=\"30%\">"
    ]
   },
   {