已知 int x=30,y=50,z=80;, 以下语句执行后变量 x 、 y 、 z 的值分别是 ____________ 。 if (x>y||x
z) z=x;x=y;y=z;
A.
x=50,y=80,z=80
B.
x=50,y=30,z=30
C.
x=30,y=50,z=80
D.
x=80,y=30,z=50
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【单选题】Suppose that your data include 4000 observations, and you must choose the number of intervals to represent in your histogram. What does Sturges' rule recommend?( 公式也可以写为m=1 + Log2 (N))
A.
Since 12 is the base 2 logarithm of 4096 (which is close to 4000), we should choose 12 intervals.
B.
The base 2 logarithm of 4096 (which is close to 4000) is 13, so Sturges' rule recommends 13 + 1 or 14 intervals.
C.
The base 2 logarithm of 4096 (which is close to 4000) is 12, so Sturges' rule recommends 12 - 1 or eleven intervals.
D.
According to Sturges' rule, there should be 13 intervals because the base 2 logarithm of 4096 (which is close to 4000) is 12
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