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Author Question: There are two letters X and Y. If repetitions such as XX are permitted, how many two-letter ... (Read 167 times)

theo

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on: Jun 24, 2018
There are two letters X and Y. If repetitions such as XX are permitted, how many two-letter permutations are possible?
 
  A) 2
  B) 4
  C) 6
  D) 8

Question 2

Which of the following is an appropriate null hypothesis?
 
  A) H0 : x - y  0
  B) H0 : Px > Py
  C) H0 : x - y < 0
  D) H0 : 2x =2y


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peilian

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Reply #1 on: Jun 24, 2018
Answer to Question 1

B

Answer to Question 2

D


theo

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  • Posts: 698
Reply 2 on: Jun 24, 2018
Wow, this really help

chereeb

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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