Author Question: When should a researcher decide whether an alternative hypothesis should be one-sided or two-sided? ... (Read 123 times)

tth · **on:** Jul 24, 2018

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 · **Reply #1 on:** Jul 24, 2018

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.

.