Which hypothesis would be classified as a statistical hypothesis?
a. Oxygen inhalation at 2 L/min by nasal catheter will decrease oral temperature measured with an electronic thermometer.
b. Oxygen inhalation at 2 L/min by nasal catheter will not affect oral temperature measured with an electronic thermometer.
c. There will be a greater decrease in anxiety scores in patients receiving informational videos before open heart surgery than in patients who receive standard written information.
d. There will be a difference in anxiety scores in patients receiving informational videos before open heart surgery and patients who receive standard written information.
ANS: B
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A This hypothesis is a directional hypothesis rather than a statistical (null) hypothesis.
B A statistical (or null) hypothesis indicates no relationship between variables, as represented in this statement. If in the statistical analysis, a significant relationship is found, the null hypothesis would be rejected.
C This hypothesis is a directional hypothesis rather than a statistical (null) hypothesis.
D This hypothesis is a nondirectional hypothesis rather than a statistical (null) hypothesis.
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