测得玉米品种金皇后10个果穗长度(x,cm)分别为:16,21,24,15,26,18,20,19,22,19,则玉米品种金皇后果穗长度95%置信度下的置信区间是( )。(注意:两尾临界t值[img=110x25]18038dc1f685d40.png[/img],[img=110x25]18038dc1fea4df7.png[/img]) A: [17.57, 22.43] B: [16.51, 23.49] C: [15, 26] D: [-∞, +∞]
测得玉米品种金皇后10个果穗长度(x,cm)分别为:16,21,24,15,26,18,20,19,22,19,则玉米品种金皇后果穗长度95%置信度下的置信区间是( )。(注意:两尾临界t值[img=110x25]18038dc1f685d40.png[/img],[img=110x25]18038dc1fea4df7.png[/img]) A: [17.57, 22.43] B: [16.51, 23.49] C: [15, 26] D: [-∞, +∞]
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