An analyst does research about hypothesis testing. Which of the following test statistics is most appropriate test statistics for two means based on samples that we believe are dependent A: T-test. B: F-test. C: Chi-square test.

删除test子目录下的所有文件( ) A: B: rm -rf test C: D: rmdir test E: F: rmdir -r test G: H: mkdir -r test

rm命令要强制删除/home目录下的test文件，应该如何做操作？‎​‎ A: rm test B: rm -r test C: rm -f test D: rm -i test

The degrees of freedom for the F test in a one-way ANOVA are:

How come Anna got a F in the English test?

Analysis of variance uses the ( ) test A: z B: f C: chi-square D: F

判断一个文件/mnt/cdrom存在且为目录的命令是( )。 A: test -d /tmp/cdrom B: test -f /tmp/cdrom C: test -r /tmp/cdrom D: test -w /tmp/cdrom

11. String test = “Test A. Test B. Test C.”； 12. // insert code here 13. String[] result = test.split（regex）； Which regular expression inserted at line 12 will correctly split test into “Test A，” “Test B，” and “Test C”？（） A: String regex = “”； B: String regex = “ “； C: String regex = “.*“. D: String regex = “\\s” E: String regex = “\\.\\s*”； F: String regex = “\\w[ \.] +“；

11. String test = “Test A. Test B. Test C.”；  12. // insert code here  13. String[] result = test.split（regex）；  Which regular expression inserted at line 12 will correctly split test into “Test A，” “Test B，” and “Test C”？（） A:  String regex = “”； B:  String regex = “ “； C:  String regex = “.*“. D:  String regex = “\\s” E:  String regex = “\\.\\s*”； F:  String regex = “\\w[ \.] +“；

Define a function as below with f as the function parameter,def test(f, a, b): print(f(a, b))Which of the following options will be the result of test((lambda x,y: x ** 3 + y), 2, 3)? A: 8 B: 9 C: 10 D: 11