A Researcher Conducts a Hypothesis Test to Evaluate the Effect

question 84

Multiple Choice

A researcher conducts a hypothesis test to evaluate the effect of a treatment that is expected to increase scores.The hypothesis test produces a z-score of z = 2.27.If the researcher is using a one-tailed test,what is the correct statistical decision?

• A)Reject the null hypothesis with α = .05 but not with α = .01.
• B)Reject the null hypothesis with either α = .05 or α = .01.
• C)Fail to reject the null hypothesis with either α = .05 or α = .01.
• D)Cannot answer without additional information

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Definitions:

IR Absorption

The absorption of infrared radiation by molecules, leading to changes in vibrational energy levels, used in spectroscopy to identify functional groups.

Intense IR Absorption

A characteristic of some materials to strongly absorb infrared radiation at specific wavelengths, indicative of particular molecular bonds.

Characteristic IR Absorption

The specific frequency at which a molecule absorbs infrared light, indicative of particular bonds or functional groups within the molecule.

C-H Stretch

A vibration in infrared spectroscopy indicating the presence of C-H bonds, useful in identifying organic compounds.