For 2x2 tables, the degrees of freedom equals 1. True or false？

针对下列程序段回答问题 ().for(t=1;t<=100;t++){scanf("%d",&x);if(x<0) ______

设二维离散型随机变量(X, Y)的联合分布律为: [图] 则...

设随机变量X和Y的概率密度分别为： [图] 且X和Y相互独...

令谓词Emai（x，y）表示“x给y发过邮件”，Tel（x，y）表示“x给y打过电话”，其中x和y的个体域是计算机研一学生。试用Email(x,y)和Tel(x,y)和量词以及逻辑联结符号表示下列语句： （1）李明从来没给王菲发过电子邮件，或者打过电话。 （2）研一班每个同学都给李明发过邮件。 （3）研一班有两个 同学互发过邮件。

Carriageways Co had the following bank loans outstanding during the whole of 20X8: $m 9% loan repayable 20X9 15 11% loan repayable 20Y2 24 Carriageways Co began construction of a qualifying asset on 1 April 20X8 and withdrew funds of $6 million on that date to fund construction. On 1 August 20X8 an additional $2 million was withdrawn for the same purpose. Calculate the borrowing costs which can be capitalised in respect of this project for the year ended 31 December 20X8.

总体X~B(1, p) ,0

The categories must be chosen before examination of the data and should not be selected to maximize group differences. True or false?

The test values for the chi-square goodness-of-fit test and the independence test are computed by using the same formula. True or false?

The degrees of freedom for a 4 x 3 contingency table are ( )

The test of significance for r has ( ) degrees of freedom