A statistical table is a statistical table. There is no such thing as a "bar statistical table". If you study statistics, I will use words to describe this statistical table;

1, 9 rows and 3 columns in the statistical table.

2. The key words are "height (cm)", "boy" and "girl"

3. The object is "<140" "140-144" (your description is wrong, not144-144) "145-/kloc.

4. Numbers in the table: the object is the first column (that is, the centimeters of height), the numbers in the second column are: 0, 0, 2, 7, 5, 2, 1, and the third column is: 0, 2, 0, 4, 3 (the first row is the subject "boy").

This is all the statistics. Strictly speaking, it's actually just grouping, without any statistics. But according to your question, statistics are not needed.

(1), there are 7 boys in the height range 150- 154, and 9 girls in the height range 160- 164.

(2) Boys are the highest > 169 and the shortest 145- 149, with a difference of (169-147 = 22 cm) (22 cm, which is statistically called "grade difference". Girls are the highest > 169 and the lowest 140- 144, with a difference of (169- 142=27 cm).

Note: In the formula, 147 is the average of "145- 149" and 142 is the average of "140- 144".

(3) Idea: There are 46 students in this class, except for two who are above 169, all of them are short.

(4) Data analysis: A, there are 22 boys and 24 girls in this class, and "Yin flourishes while Yang declines". B, most boys are between 150- 154, and most girls are between 160- 164, which is the ideal height. C, the average height of boys is 157, and the average height of girls is 159, which shows that girls in this class are better than boys. D. The students in this class are tall or short, with a difference of 22 for boys and 27 for girls. If they line up for inspection, they may laugh a lot.

(5) Other analysis of means and mean square analysis estimates that you don't need it, so don't calculate it.