When should a researcher decide whether an alternative hypothesis ...

[tth]

When should a researcher decide whether an alternative hypothesis should be one-sided or two-sided?
 a. Before collecting the data.
  b. While the data are being collected, and a pattern begins to emerge.
  c. After the data have been collected and the researcher has had a chance to summarize them to see what direction the results may take.
  d. No single rule will apply to all situations; each one is different.

Question 2

How is it possible that two different statistical analyses of the same data set can produce different results and more importantly, different conclusions?

[wfdfwc23]

Answer to Question 1

A

Answer to Question 2

ANY REASONABLE ANSWER OK. EXAMPLES: 1) PERHAPS ONE OR BOTH OF THE ANALYSES WERE INAPPROPRIATE FOR THE DATA; 2) THE ASSUMPTIONS OR CONDITIONS WERE NOT MET; 3) ONE ANALYSIS WAS MORE POWERFUL THAN THE OTHER.

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[tth]

TYSM

[JaynaD87]

Excellent