Which of the following tests must be two-tailed? A) U test B) ...

[lbcchick]

Which of the following tests must be two-tailed?
 
  A) U test B) one-sample sign test
  C) number of runs test D) paired-sample sign test

Question 2

If a distribution has the general shape of the cross section of a bell, then the _______ allows for a stronger
  statement than Chebyshevs theorem.
 
  Fill in the blank(s) with correct word

[jxjsniuniu]

Answer to Question 1

C

Answer to Question 2

empirical rule

[lbcchick]

Great answer, keep it coming

[bitingbit]

Thanks for the timely response, appreciate it