What decision would you expect the researchers to make with respect to the null hypothesis?

 

What decision would you expect the researchers to make with respect to the null hypothesis?

 

 

James works in a paediatric surgical ward, where the majority of children are admitted for elective surgery. He is concerned about the level of distress and anxiety children display on admission and the nursing staff, in conjunction with the Play Therapy department and child psychologists, develop a package to prepare pre-school children for their hospital experience. James wants to know whether this package will have an effect on children™s distress.
a) Generate a null hypothesis and an alternate (non-directional) hypothesis for James™s question.
i) Null:
ii)Alternate:

b) What would be the ideal research design to answer this question? Give reasons.

c) What other design(s) could be used? Why might these be chosen in preference to the one identified above?

d) Identify the main ethical issue for this study.

James and his team carry out the study. They choose an objective measure of children™s distress “ salivary cortisol, measured in mcg/dl and expected to be normally distributed.
e) Identify
i) the independent variable
ii) the dependent variable

f) What measurement will the researchers use to examine the effectiveness of the package?

g) What statistical test would be appropriate to test the hypothesis?

h) The test is performed and the result generated is p=0.03. Interpret the p-value.

i) What decision would you expect the researchers to make with respect to the null hypothesis?

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