A Researcher Conducts a Hypothesis Test to Evaluate the Effect

question 34

Multiple Choice

A researcher conducts a hypothesis test to evaluate the effect of a treatment.The hypothesis test produces a z-score of z = 2.37.Assuming that the researcher is using a two-tailed test, what decision should be made?

• A)The researcher should reject the null hypothesis with α = .05 but not with α = .01.
• B)The researcher should reject the null hypothesis with either α = .05 or α = .01.
• C)The researcher should fail to reject H₀ with either α = .05 or α = .01.
• D)Cannot answer without additional information.

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Definitions:

Standard Deviation

Standard Deviation is a statistic that measures the dispersion or variability of a set of data points relative to its mean.

Scores Ranged

Refers to the distribution or span of scores achieved in a test, from the lowest to the highest mark.

Median

The middle value in a data set, which separates the higher half from the lower half.

Positively Correlated

A relationship between two variables where an increase in one variable is associated with an increase in the other.