Granny Peanut's joke

(1) In the picture, A asks questions, and Grandma and B are hypothetical. Xiao Gang is a complement to what A said.

(2) Grandma's hypothesis is that varieties affect the size of peanut fruit, and the variables are different varieties of peanuts. In the experiment, the cultivation conditions of different varieties of peanuts are the same; Xiao Ming's hypothesis is that cultivation conditions affect the size of peanut fruit, such as soil or water, and the variable is cultivation conditions. In the experiment, the same variety of peanut seeds were planted under different cultivation conditions.

(3) In order to make the results of sampling inspection close to the real situation of the whole population, we should try to avoid the influence of subjective factors when sampling. A certain number of seeds (not less than 30 are recommended) should be randomly selected as samples.

(4) In order to make the experimental results accurate and reliable, multiple seeds should be selected and averaged. Therefore, there should be enough samples, and it is recommended not to be less than 30.

(5) In order to average the experimental results accurately, another method can be used to draw a graph with coordinates.

So, the answer is: (1) b;

(2) peanut varieties; Same;

(3) a;

(4)C；

(5) general; Draw a picture with coordinates.