For a two-tail test, the null hypothesis will be rejected at the ...

[scienceeasy]

For a two-tail test, the null hypothesis will be rejected at the 0.05 level of significance if the value of the standardized test statistic z is:
 a. smaller than 1.96 or greater than -1.96
  b. greater than -1.96 or smaller than 1.96
  c. smaller than -1.96 or greater than 1.96
  d. greater than 1.645 or less than -1.645

Question 2

If the odds ratio that an obese person who smokes 15 or more cigarettes per day suffers a heart attack is 9, then the probability that the person will suffer a heart attack is 0.81.
  Indicate whether the statement is true or false

[ilianabrrr]

Answer to Question 1

C

Answer to Question 2

F