The _____ for differences of proportions is a technique used to ...

[justinmsk]

The _____ for differences of proportions is a technique used to test the hypothesis that proportions are significantly different for two independent samples or groups.
 Fill in the blank(s) with correct word

Question 2

Email, as an effective marketing communications tool is under assault from one of its own hybrids. What is the hybrid called?
 a. pop-ups c. spam
  b. transitional advertising d. websites

[tranoy]

Answer to Question 1

Z-test

Answer to Question 2

C
Spam is bulk, unsolicited email that undermines the effectiveness of email as a marketing communications tool.