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Junior high school grade two math report form
(1) Xiao Ming's average score is: (70+80+80+90+70+80+90) ÷10 = 80.

S2 = 1 10×( 100+ 100+ 100 = 100+ 100)= 60,

The average score of Xiaoying is (60+80+70+100+50+90+70+90+100+90) ÷10 = 80.

The median is 85 and the mode is 90.

∴ 80,60 first line 80,85,90 second line ((5 points), 1 minute per space)

(2) Xiaoying's excellent rate is 510 =12,

Xiao Ming's excellent rate is: 310 = 310,

∵ 12>3 10,

The student with high excellent rate is Xiaoying.

So the answer is Xiaoying.

(3) Not only that, such as: Xiaoming still needs to work hard to further improve the excellent rate;

Xiaoying's study should be persistent and steady. (10)