I If the Null Hypothesis States That There Is No

question 49

Multiple Choice

i. If the null hypothesis states that there is no difference between the mean income of males and the mean income of females, then the test is one-tailed.
Ii) If we are testing for the difference between two population means, it is assumed that the sample observations from one population are independent of the sample observations from the other population.
Iii) The critical value of t for the claim that the difference of two means is less than zero with = 0.025 and sample sizes of nine and seven, is -2.179.

• A) (i), (ii) and (iii) are all correct statements
• B) (i) and (ii) are correct statements, but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) (ii) is a correct statement, but not (i) and (iii).

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