返回列表 发帖

每日一练F2 答案回复可见

Regression analysis is being used to find the line of best fit (y = a + bx) from five pairs of data. The calculations have
produced the following information:
Σx = 129       Σy = 890     Σxy = 23,091        Σx2 = 3,433        Σy2 = 29,929
What is the value of ‘a’ in the equation for the line of best fit (to the nearest whole number)?
A   146
B   152
C   210
D   245

A

a

TOP

X

X

TOP

[em02]

TOP

我又来了

TOP

a

TOP

TOP

.。。

TOP

have a look

TOP

谢谢

TOP

返回列表