第三章第三章 统计案例统计案例1234567891011121314x51015202530y7.258.128.959.9010.911.81516171819202122x21232527293235y7112124661153252324x21232527293235z1.9462.3983.0453.1784.1904.7455.78425yi711212466115325yi6.44311.10119.12532.95056.770128.381290.325ei0.5570.1011.8758.9509.2313.38134.67526272829x0.250.5124y16125213031t4210.50.25y161252132333435天数天数x/天天123456繁殖个数繁殖个数y/个个6122549951903637x123456z1.792.483.223.894.555.25383940414243