测定了中籼品种南京11号13块高产田的穗数(x, 万/666.67m2):26.7,31.3,30.4,33.9,34.6,33.8,30.4,27.0,33.3,30.4,31.5,33.1,34.4,该样本的中位数[img=44x22]18038dc6107f606.png[/img]( )。
A: 31.5
B: 30.4
C: 31.3
D: 31.6
A: 31.5
B: 30.4
C: 31.3
D: 31.6
举一反三
- 测定了中籼品种南京11号13块高产田的穗数(x, 万/666.67m2):26.7,31.3,30.4,33.9,34.6,33.8,30.4,27.0,33.3,30.4,31.5,33.1,34.4,该样本的中位数[img=44x22]1803de649993bda.png[/img]( )。 A: 31.5 B: 30.4 C: 31.3 D: 31.6
- 测定了中籼品种南京11号13块高产田的穗数(x, 万/666.67m2):26.7,31.3,30.4,33.9,34.6,33.8,30.4,27.0,33.3,30.4,31.5,33.1,34.4,该样本的极差[img=33x19]18038dc633caab7.png[/img]( )。 A: 0 B: 7.9 C: 26.7 D: 34.6
- 测定了中籼品种南京11号13块高产田的穗数(x, 万/666.67m2):26.7,31.3,30.4,33.9,34.6,33.8,30.4,27.0,33.3,30.4,31.5,33.1,34.4,已计算得样本平均数[img=67x18]18038dc66e02301.png[/img],则[img=99x27]18038dc67652ca0.png[/img]( )[img=76x27]18038dc67ef4974.png[/img]。 A: = B: > C: < D: ≈
- 2015年我国稻谷产量占谷物产量的比重为()。 A: 36.4% B: 34.6% C: 33.5% D: 30.4%
- 牧场管理系统中的一个月为()天。 A: 28 B: 30 C: 30.4 D: 31